L'aîné est décrit comme un loser par son oncle, le cadet accumule les éloges. Le premier n'est pas intégré, le second aimé de tous, Tamerlan et Djokhar Tsarnaev appartenaient-ils à un groupe terroriste étranger ou ont-ils agi de leur propre initiative? Loin du complot étranger, les informations parcellaires et fragmentées qui nous parviennent permettent de dresser le portrait de deux jeunes hommes dont les germes du passage à l'acte se trouvent sur le territoire américain.

Pour les Etats-Unis, c'est la découverte d'un nouveau danger. Une surprise particulièrement flagrante dans certaines analyses des événements outre-Atlantique (cliquez ici et ici pour lire celles du HuffPost américain). S'ils ont appris à vivre avec la menace du terrorisme extérieur, la violence d'extrémistes de droite de l'intérieur et l'irruption de tueries telles que celles de Columbine, de Virginia Tech et de Sandy Hook, l'autoradicalisation d'individus issus de l'immigration sur le territoire américain constitue un phénomène nouveau outre-Atlantique. Car les frères Tsarnaev, ce sont aussi deux parcours qui en rappellent un autre, celui de Mohamed Merah.

"Je n'ai pas d'amis américain. Je ne les comprends pas," aurait déclaré Tamerlan Tsarnaev à un étudiant journaliste qui réalisait un portrait du jeune homme en boxeur. Certes il y a d'un côté l'Europe, de l'autre l'Amérique, à Toulouse la cité des Izards, un jeune né en France, à Boston la ville de Cambridge l'un des épicentres de la formation des élites américaines, c'est pourtant bien la même mécanique qui semble s'être imposée.

Immigration, déracinement, liens distendus avec la cellule familiale, duos fraternels très idéologisés, relation problématique avec la religion. Des pays d'origines aux passés violents et traumatiques, l'Algérie pour Merah, la Tchétchénie pour les frères Tsarnaev, des histoires d'intégration qui laissent la place à la désintégration.

Autoradicalisation

Fanatisme aveugle ou endoctrinement, l'enquête devra déterminer le rôle réel ou fantasmé qu'a joué la religion, les données parcellaires dont on dispose n'autorisant, pour l'instant, que des hypothèses. Le New York Times indique que sur son profil VK, le Facebook russe, Djokhar aurait renseigné "l'Islam" en tant que "vision du monde". Choix paradoxal ou par défaut, il aurait également sélectionné "career and money", "la carrière et l'argent", comme principal intérêt.

La chasse à l'homme du deuxième suspect: les photos de nos collègues américains (Suite du texte dessous la galerie)

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  • Police Leave The Scene After Capturing Suspect

    Members of a police S.W.A.T. team exit Franklin Street moments after 19-year-old bombing suspect Dzhokhar A. Tsarnaev was apprehended on April 19, 2013 in Watertown, Massachusetts. A manhunt for a Tsarnaev ended this evening with his capture on a boat parked on a residential property in Watertown, Massachusetts.

  • Relieved Police Officers After Suspect's Capture

    Two police officers laugh while securing the area around Franklin Street on April 19, 2013 in Watertown, Massachusetts. A manhunt for a suspect in the Boston Marathon bombing, Dzhokhar A. Tsarnaev, 19, ended this evening with his capture on a boat parked on a residential property in Watertown, Massachusetts.

  • Watertown Residents Celebrate

    Residents applaud after the capture of the second of two suspects wanted in the Boston Marathon bombings April 19, 2013 in Watertown, Massachusetts.

  • Media Interview Cops After Suspect Captured

    A SWAT team member is followed by reporters and a celebrating crowd after the successful operation to capture 19-year-old bombing suspect Dzhokhar A. Tsarnaev on April 19, 2013 in Watertown, Massachusetts.

  • Watertown Residents Waiting As Police Closed In On Suspect

    Residents await the capture of the second of two suspects wanted in the Boston Marathon bombings April 19, 2013 in Watertown, Massachusetts. Thousands of heavily armed police staged an intense manhunt for a Chechen teenager suspected in the Boston marathon bombings with his brother, who was killed in a shootout.

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Resident Rosie Meyer, who said she heard gunshots, reacts while watching police respond on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly Chechen of origin, are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Mario Tama / Getty Images)

  • Suspect No, 2's Last Stand

    Police officers guard the entrance to Franklin street where there is an active crime scene search for the suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass. Gunfire erupted Friday night amid the manhunt for the surviving suspect in the Boston Marathon bombing, and police in armored vehicles and tactical gear rushed into the Watertown neighborhood in a possible break in the case. (Matt Rourke / AP)

  • Suspect No, 2's Last Stand

    Mimi de Quesada, of Watertown, Mass., reacts while standing by her home in the wake of the sound of shots fired in Watertown, Mass., Friday, April 19, 2013, as a massive search continued for one of two suspects in the Boston Marathon bombings. De Quesada said she had just come out to enjoy the day when the shots rang out about two blocks form her home. A second suspect died in the early morning hours after an encounter with law enforcement. (Craig Ruttle / AP)

  • Suspect No, 2's Last Stand

    An officer evacuates a child away from an area where a suspect is hiding on Franklin St., on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    People watch as police search for suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass. Gunfire erupted Friday night amid the manhunt for the surviving suspect in the Boston Marathon bombing, and police in armored vehicles and tactical gear rushed into the Watertown neighborhood in a possible break in the case. (Matt Rourke / AP)

  • Suspect No, 2's Last Stand

    Many different law enforcement agencies descend on an area around Franklin Street on April 19, 2013 in Watertown, Massachusetts. After a car chase and shootout with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15 that killed three people and wounded at least 170. (Jared Wickerham / Getty Images)

  • Suspect No, 2's Last Stand

    Police converge near the scene where it was believed 19-year-old bombing suspect Dzhokhar A. Tsarnaev is in hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly Chechen of origin, are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Spencer Platt / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    People react while watching police respond to a reported shooting on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly Chechen of origin, are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Mario Tama / Getty Images)

  • Suspect No, 2's Last Stand

    Members of a police S.W.A.T. team run to the scene where it was believed 19-year-old bombing suspect Dzhokhar A. Tsarnaev is in hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly of Chechen origin, are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Spencer Platt / Getty Images)

  • Suspect No, 2's Last Stand

    Police converge near the scene where it was believed 19-year-old bombing suspect Dzhokhar A. Tsarnaev is in hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly of Chechen origin, are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Spencer Platt / Getty Images)

  • Suspect No, 2's Last Stand

    Family members who fled the scene where it was believed 19-year-old bombing suspect Dzhokhar A. Tsarnaev is in hiding are comforted on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly of Chechen origin, are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Spencer Platt / Getty Images)

  • Suspect No, 2's Last Stand

    Members of a police S.W.A.T. team run to the area where it was believed 19-year-old bombing suspect Dzhokhar A. Tsarnaev is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police last night, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two men, reportedly of Chechen of origin, are suspects in the bombings at the Boston Marathon on April 15 that killed three people and wounded at least 170. (Spencer Platt / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • Suspect No, 2's Last Stand

    Law enforcement approach an area reportedly where a suspect is hiding on April 19, 2013 in Watertown, Massachusetts. After a car chase and shoot out with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old Dzhokhar A. Tsarnaev. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Darren McCollester / Getty Images)

  • The Manhunt Continues

    A woman carries a girl from their home as a SWAT team searching for a suspect in the Boston Marathon bombings enters the building in Watertown, Mass., Friday, April 19, 2013. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead and another still at large Friday, authorities said as the manhunt intensified for a young man described as a dangerous terrorist. (AP Photo/Charles Krupa)

  • Manhunt For Bombing Suspect No. 2

    Police in tactical gear surround an apartment building while looking for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013. All residents of Boston were ordered to stay in their homes Friday morning as the search for the surviving suspect in the marathon bombings continued after a long night of violence that left another suspect dead. (AP Photo/Charles Krupa)

  • Manhunt For Bombing Suspect No. 2

    A police officer evacuates a shoeless man holding a child as members of law enforcement conduct a search for a suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during a getaway attempt in a long night of violence that left one of them dead and another still at large Friday, authorities said as the manhunt intensified for a young man described as a dangerous terrorist. (AP Photo/Matt Rourke)

  • Manhunt For Bombing Suspect No. 2

    Residents look out a window as officials inspect an apartment building in Watertown, Mass., Friday, April 19, 2013. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead and another still at large Friday. (AP Photo/Julio Cortez)

  • Manhunt For Bombing Suspect No. 2

    Heavily armed police officers do house to house searches the neighborhoods of Watertown, Mass. Friday, April 19, 2013, as a massive search continued for one of two suspects in the Boston Marathon bombing. A second suspect died in the early morning hours after an encounter with law enforcement. (AP Photo/Craig Ruttle)

  • Manhunt For Bombing Suspect No. 2

    Police in tactical gear conduct a search for a suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass. The bombs that blew up seconds apart near the finish line of the Boston Marathon left the streets spattered with blood and glass, and gaping questions of who chose to attack and why. (AP Photo/Matt Rourke)

  • Manhunt For Bombing Suspect No. 2

    Tactical teams exit an apartment building while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during a getaway attempt in a long night of violence that left one of them dead and another still at large Friday, authorities said as the manhunt intensified for a young man described as a dangerous terrorist. (AP Photo/Charles Krupa)

  • Manhunt For Bombing Suspect No. 2

    KRON 4 Coverage of the Watertown Mass. Manhunt

  • Manhunt For Bombing Suspect No. 2

    A police officer in tactical gear conducts a search for a suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass. The bombs that blew up seconds apart near the finish line of the Boston Marathon left the streets spattered with blood and glass, and gaping questions of who chose to attack and why. (AP Photo/Matt Rourke)

  • Manhunt For Bombing Suspect No. 2

    Police continue to patrol the neighborhoods of Watertown, Mass. Friday, April 19, 2013, as a massive search continued for one of two suspects in the Boston Marathon bombing. A second suspect died in the early morning hours after an encounter with law enforcement. (AP Photo/Craig Ruttle)

  • Police Search For Suspect

    A police officer with gun drawn searches for a suspect on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. It's not clear whether the shootings are related or whether either are related to the Boston Marathon bombing.

  • Manhunt For Bombing Suspect No. 2

    The search continues April 19, for the second suspect in the Boston Marathon bombings.

  • Manhunt For Bombing Suspect No. 2

    Man being taken into custody on Nichols Ave and Quimby. Police overheard saying "he has shit all in his pockets."

  • Manhunt For Bombing Suspect No. 2

    A neighbor is escorted to safety as police surround a home while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013. The two suspects in the Boston Marathon bombing killed an MIT police officer and hurled explosives at police in a car chase and gun battle overnight that left one of them dead and his brother on the loose, authorities said Friday. (AP Photo/Charles Krupa)

  • Cops In Bullet Proof Vests

    Cops suiting up with bullet proof vests in Watertown.

  • Reports Of Shooting, Explosions In Watertown

    A vehicle carrying officers in tactical gear arrives at the Watertown neighborhood of Boston, Friday, April 19, 2013. Dozens of officers and National Guard members are in Watertown, where television outlets report that gunfire and explosions have been heard.

  • Officers Arrive In Watertown

    Officers wearing tactical gear arrive at the Watertown neighborhood of Boston, Friday, April 19, 2013.

  • A girl looks out the window of her family's home as a SWAT team drives through her neighborhood while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead and another still at large Friday, authorities said as the manhunt intensified for a young man described as a dangerous terrorist. (AP Photo/Charles Krupa)

  • FBI On Scene In Watertown

    An FBI official arrives at the Watertown neighborhood of Boston, Friday, April 19, 2013.

  • Police Establishing Perimeter

    Boston Police are setting up perimeter tape across Nichols Avenue right now.

  • Police officers stand guard in a staging area as nearby officials conducts a search for a suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass. The two suspects in the Boston Marathon bombing killed an MIT police officer and hurled explosives at police in a car chase and gun battle overnight that left one of them dead and his brother on the loose, authorities said Friday. (AP Photo/Matt Rourke)

  • Manhunt For Bombing Suspect No. 2

    Boston Police chief on the scene in Boston's Watertown neighborhood.

  • Christina Wilkie Reports From Watertown

  • FBI Agents Arrive In Watertown

    A half-dozen FBI agents just arrived at the Nichols Ave perimeter. At least one in a bulletproof vest.

  • Raw Shooting at MIT Watertown

    A NewsCenter 5 viewer sent in uncut video of a shootout between police and at least one suspect in the streets of Watertown, Mass.

Quant à Tamerlan Tsarnaev, l'édition américaine du Huffington Post, rappelle qu'un un compte YouTube, qui pourrait être celui du suspect, est abonné à plusieurs chaînes islamiques. Le compte recense également quatre listes de lectures dont une est intitulée "Islam", une seconde "Terrorists". Non authentifié, le nom de Tamerlan Tsarnaev n'était pas encore associé au compte en janvier 2013. S'agissait-il néanmoins du sien? A-t-il été créé par quelqu'un d'autre?

Les autorités américaines voudraient également en savoir plus sur le séjour prolongé de Tamerlan en Russie l'année précédente. Sur le site Amazon, sa wishlist regroupe plusieurs ouvrages sur l'histoire de la Tchétchénie, de l'islam, mais également des méthodes de falsification d'identité.

Dans le reportage qui lui a été consacré par le photojournaliste Johannes Hirn en 2009 (voir les photos), Tamerlan déclare être musulman, ne pas boire et ne pas fumer. "Dieu dit de ne pas boire," affirme-t-il, avant d'ajouter: "il n'y a plus de valeurs aujourd'hui." Le jeune homme est alors étudiant au Community College de Bunker Hill, une institution universitaire. Son souhait: boxer et intégrer l'équipe olympique états-unienne, afin d'être naturalisé américain.

S'il avait à choisir entre la Russie et les Etats-Unis, Tamerlan affirme alors qu'il se battrait pour les Etats-Unis tant que la Tchétchénie, son pays d'origine, ne serait pas indépendant. Mais en 2009, ses espoirs sont trahis lors d'un championnat national à Salt Lake City au cours duquel les juges lui volent la victoire. Comme Mohamed Merah, Tamerlan a-t-il connu le ressentiment? En guise de réponse vient une zone d'ombre suivie par son arrestation pour violences sur sa petite amie italo-portugaise avec qui il a eu un enfant.

Déracinés

L'Islam aura-t-il été un refuge pour un Tamerlan Tsarnaev déraciné? La réponse vient peut-être de son petit frère Djokhar. Selon un témoignage, celui-ci cherchait à en savoir davantage sur son pays d'origine.

En pleine quête identitaire, il prend contact avec Brian Williams, professeur d'histoire islamique à l'Université de Dartmouth, dans le Massachussets, en 2011. L'homme n'est pas n'importe qui. C'est l'un des seuls experts américains de l'histoire de la Tchétchénie.

D'après Williams, il voulait savoir plus sur ce pays auquel les Russes ont refusé l'indépendance, au prix de trois guerres sanglantes qui ont déchiré le pays de 1994 à 2001. 200.000 morts au total et une insurrection qui perdure. Depuis la conquête du Caucase par les Russes au XIXè siècle, Russes orthodoxes et Tchétchènes musulmans sont à couteaux tirés. Pendant la Seconde guerre mondiale, Staline fera déporter près de 400.000 Tchétchènes. Nombre d'entre eux se réfugient Kirghizstan, un pays voisin en Asie centrale. La famille Tsarnaev en fait partie.

La Tchétchénie, les deux frères en entendent parler mais ils ne la connaissent pas. Héritiers de la diaspora, ils grandissent avec leur famille au Kirghizstan où ils font partie de l'intelligentsia. Après un bref passage d'un an par la République du Daghestan en Russie, les Tsarnaev émigrent aux Etats-Unis en 2002. Tamerlan a 15 ans, Djokhar 8. En Amérique, les deux frères s'adaptent, apprennent une nouvelle langue, une nouvelle culture, se font de nouveaux amis.

Le joker

Pétri d'admiration pour son aîné, le parcours de Djokhar est exemplaire. Petit garçon discret au "visage d'ange", les témoignages concordent. Ils parlent d'un jeune homme sympathique, droit, serviable, du genre à rendre service. Comme Tamerlan, il passe par la Cambridge Ridge et Latin School où des personnalités telles que Ben Affleck et Matt Damon les ont précédés.

Lutteur, Djokhar est récompensé en par la Greater Boston League en 2011. Quelques semaines plus tard, alors qu'il s'apprête à quitter le lycée, il se voit attribuer une bourse de 2500 dollars par la ville de Cambridge. L'honneur n'est pourtant réservé qu'à 40 jeunes chaque année. Les problèmes commencent alors que Djokhar arrive à l'Université de Dartmouth. Un relevé de notes consulté par le New York Times en témoigne, Djokhar est en situation d'échec dans de nombreuses matières.

Perte de contrôle, fascination pour un aîné en pleine dérive, comment expliquer la participation de Djokhar, pourtant bien intégré, aux attentats de Boston? Si Mohamed Merah était nourri d'un très fort ressentiment à l'égard de la société française, de quelle nature était celui des frères Tsarnaev dont les bombes ont explosé le 15 avril, jour des patriotes? Ont-ils l'un et l'autre tué pour les mêmes raisons? Et quelle est la dimension familiale de leur drame?

Mis en état d'arrestation, à Djokhar Tsarnaev de répondre de ses actes. Pour comprendre ce qui s'est joué le 15 avril 2013, à bien des égards, il fait figure de joker. Dans le Caucase, terre natale des frères Tsarnaev, l'homme de Vladimir Poutine, le président Tchétchène Ramzan Kadyrov a préféré botter en touche en déclarant sur son compte Instagram: "Il faut chercher les racines du mal aux Etats-Unis."

Les photos de la traque dans Boston depuis jeudi (dans l'ordre chronologique):

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  • Chasse à l'homme

    Des coups de feu, des explosions, une ville entière en état de siège: l'agglomération de Boston a été le théâtre d'une vaste chasse à l'homme débutée dans la nuit du jeudi 19 au vendredi 20 avril pour retrouver les suspects de l'attentat à la bombe du marathon.

  • Premiers coups de feu

    Jeudi à 22h20 (heure de Boston), quelques heures après que le FBI eut diffusé des photos de suspects de l'attentat de lundi, la police est alertée sur des coups de feu tirés sur le campus du Massachusetts Institute of Technology, prestigieux établissement universitaire situé à l'ouest du centre-ville de Boston, de l'autre côté de la rivière Charles.

  • Un policier tué

    Dix minutes plus tard, le corps d'un policier tué par balles est retrouvé dans sa voiture, du côté est du campus.

  • Fusillade et explosifs

    Peu après, les forces de l'ordre sont informées que deux hommes ont volé une voiture à Cambridge, près du campus, et pris son conducteur en otage pendant 30 minutes avant de le relâcher, sain et sauf, à une station-service. La police se met à la recherche du véhicule et le retrouve à Watertown, une banlieue située à l'ouest de Cambridge. Une chasse s'enclenche, lors de laquelle une fusillade éclate. Les suspects lancent des explosifs. Un des suspects est blessé, son décès est ensuite constaté à l'hôpital. Un policier est lui aussi touché.

  • Quartier bouclé

    Les forces spéciales de la police ont bouclé la majeure partie de Watertown dans leur traque du deuxième suspect et un deuxième policier a été blessé dans les opérations.

  • Peur sur la ville

    La police se lance dans une opération de recherche, maison par maison, à Watertown, prévenant que le fugitif restant est "armé et dangereux". A deux heures du matin, la police de l'Etat appelle les habitants de Watertown à rester chez eux et à ne pas ouvrir, sauf s'il s'agit d'un policier. Des camion pour désamorcer des bombes sont mobilisés.

  • Plus de 9000 policiers mobilisés

    Le dispositif est impressionnant. Près de 9000 policiers armés de fusil à pompe ou de fusils d'assaut sont mobilisés pour passer Watertown au peigne fin.

  • Transports suspendus, écoles fermées... la banlieue de Boston paralysée

    Il n'y a pas que les habitants de Watertown qui ont ordre de rester chez eux. La population de Newton, Waltham, Belmont, Cambridge et Allston-Brighton ont reçu les mêmes consignes. Plusieurs écoles de ces localités sont fermées. Pour rappel, les transports publics de la région ont déjà été suspendus.

  • Suspects identifiés

    Vendredi, on apprend que les deux hommes sont deux frères d'origine tchétchène et résidents américains: Tamerlan Tsarnaev, 26 ans, et Dzokhar Tsarnaev, 19 ans. C'est le premier des deux qui a été abattu par la police.

  • Le SWAT est sur place

    Un bus a déposé des agents du SWAT, l'équivalent du GIGN ou du Raid en France, à Watertown. La garde nationale est aussi appelée en renfort.

  • Le SWAT est sur place

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

  • Le SWAT est sur place

    Les policiers quadrillent Watertown.

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