Sen. Robert Casey (D-Penn.), a member of the Senate Foreign Relations Committee, asks questions during a hearing Thursday, Dec. 20, 2012 on the Benghazi attack. William J. Burns, deputy secretary of state, and Thomas R. Nides, deputy secretary of  state for management and resources, were witnesses. (Barbara L. Salisbury/The Washington Times)

Photo by: BARBARA L. SALISBURY

Sen. Robert Casey (D-Penn.), a member of the Senate Foreign Relations Committee, asks questions during a hearing Thursday, Dec. 20, 2012 on the Benghazi attack. William J. Burns, deputy secretary of state, and Thomas R. Nides, deputy secretary of state for management and resources, were witnesses. (Barbara L. Salisbury/The Washington Times)