Erin Burnett talks to CNN's Nic Robertson about Boston bomb suspect Tamerlan Tsarnaev's possible ties to an Islamic militant named Abu Dujana.
New details Tuesday night about what motivated Dzhokhar Tsarnaev and his brother Tamerlan to carry out the Boston marathon terror attacks that killed three and wounded more than two hundred others.
According to government officials, Dzhokhar told investigators the wars in Afghanistan and Iraq were the reasons they decided to set off the deadly bombs.
But how did these two Chechen immigrants become self-radicalized jihadists?
Our David Mattingly is Outfront with the story.
The FBI is facing tough questions about whether federal agents missed critical clues during their investigation of Tamerlan Tsarnaev - even after Russia raised a red flag about his radical Islamic views two years ago.
Speaking before the Senate Judiciary Committee, Homeland Security Secretary Janet Napolitano acknowledged Tuesday the government was aware of Tamerlan's trip to Dagestan last year, a volatile region of Russia plagued by Islamist violence.
Sen. Chuck Grassley: Was your department aware of his travels to Russia and if you weren't – the reason?
Janet Napolitano: The travel of 2012 that you are referring to… yes, the system pinged when he was leaving the United States. By the time he returned all investigations had been – the matter had been closed.
Did the agency drop the ball?
OutFront tonight: Congressman Michael McCaul, Chairman of the House Homeland Security.
According to government officials the Tsarnaev brothers became self radicalized jihadists by their own accord.
But how did these two young men end up taking this path and did they recruit others along the way?
Outfront tonight: Steven Hassan has been counseling people with radical personality changes and extreme behavior for more than three decades as the director of the Freedom of Mind research center. Hassan's latest book: Freedom of Mind: Helping Loved Ones Leave Controlling People, Cults and Beliefs is now available on Amazon.com.
The surviving suspect in the Boston Marathon bombings has cited the U.S. wars in Afghanistan and Iraq as motivating factors behind last week's attack, a U.S. government official said Tuesday.
CNN's Jake Tapper has the story.