We are now getting details about what exactly the FBI and CIA did and did not know about the Tsarnaev brothers prior to the Boston bombings. Congress now wants to know why the FBI did not pursue further investigation of Tsarnaev. Yesterday, Senators received a classified briefing on the latest from Boston. And hearings are sure to come.
Our friend and Takeaway Washington correspondent Todd Zwillich walks us through how Congress is digesting the Boston attacks, and what that might mean for security policy.