A man with ties to the Boston Marathon bombing suspect Tamerlan Tsarnaev was shot and killed by an FBI agent while being questioned in Florida, law enforcement officials said on Wednesday.The man who was shot, Ibragim Todashev, 27, allegedly attacked an agent with a knife during questioning. He was not suspected of having played any role in the bombing that killed three people and injured scores m...

A man with ties to the Boston Marathon bombing suspects was shot and killed while being questioned by the FBI in Florida, sources told NBC News.The man who was shot, Ibragim Todashev, had been interviewed about his connections to the bombing suspects before by the FBI and started out cooperative, sources told NBC News.The suspect then went to attack the agent and was shot, the sources said.The sus...