FBI agents investigate the scene in Watertown, Mass., April 23, 2013 where Boston Marathon bombing suspect Dzhokhar Tsarnaev was captured. (AP/Elise Amendola)

Boston Bombers Claim To Have Been Contacted By FBI Before Attack

In a newly released FBI interview, Tamerlan Tsarnaev claims he was approached by four mysterious men claiming to be FBI agents before the Boston attacks, corroborating earlier statements by his mother.