PHOENIX -- FBI officials say agents interviewed one of the Boston bombing suspects in 2011, to investigate another country's allegations of extremism.
The founder of a Muslim organization, which aims to prevent radicalization, says "there's a lot of work to do" to counter Islamic militancy.
Dr. Zuhdi Jasser runs the American Islamic Forum for Democracy (AIFD), which is based in Phoenix. He suspects the brothers followed the same path as the failed Times Square bomber in 2010, and the Ft. Hood gunman.
"As they go down the path of radicalization, they begin to dehumanize Americans and moderate Muslims who disagree with them," Jasser told 3TV.
"What they want to do is leave their mark on the world by destroying the societies they see as a threat to them. So the way to unravel America is to create acts of violence against runners in a marathon," Jasser said.
AIFD has a program which specifically targets young Muslim men through its "Liberty Project," for "...dialogue on Muslim reform, separation of mosque and state, and the adaptation of young Muslims to modernity."