Russian officials warned the US about the older Tsarnaev brother – Tamerlan – in 2011. When Tamerlan returned from a six-month stay in Russia the next year, US officials questioned him and his family about any ties with radical Islam but determined that he was not a threat.
“The ball was dropped in one of two ways,” US Sen. Lindsey Graham (R) of South Carolina said on CNN’s “State of the Union” Sunday. “The FBI missed a lot of things, is one potential answer, or our laws do not allow the FBI to follow up in a sound solid way.”
“It’s people like this that you don’t want to let out of your sight, and this was a mistake,” Sen. Graham said. “Either our laws are insufficient or the FBI failed, but we’re at war with radical Islamists and we need to up our game.”
"This is at least the fifth case I'm aware of where the FBI has failed to stop someone," Rep. King said on "Fox News Sunday," citing the examples of Anwar al-Awlaki, Nidal Malik Hasan, Carlos Bledsoe, and David Coleman Headley.