FBI faces Boston suspect questions
US security officials are to face questions in Congress over whether they mishandled information about Boston bombing suspect Tamerlan Tsarnaev.
They will brief the Senate Intelligence Committee in a closed hearing, after some US lawmakers accused the FBI of failing to act on Russian concerns.
Tsarnaev was questioned in 2011 amid claims he had adopted radical Islam.
Jane Little reports from Washington.
24 Apr 2013