From left, Ranking Member Rep. Elijah Cummings, D-Md., and Chairman Rep. Darrell Issa, R-Calif., confer with aides during  the House Oversight and Government Reform Committee's hearing on the assault on the U.S. diplomatic mission in Benghazi, Libya, on Capitol Hill in Washington, Wednesday, May 8, 2013. (Drew Angerer for The New York Times)

Congressmen and staffers listen to testimony from Gregory Hicks, former deputy chief of mission in Libya, seen on monitor, during  the House Oversight and Government Reform Committtee's hearing about the assault on the U.S. diplomatic mission in Benghazi, Libya, on Capitol Hill in Washington, Wednesday, May 8, 2013. (Drew Angerer for The New York Times)

From left, Rep. John Duncan, R-Tenn., Rep. Rob Woodall, R-Ga., and Rep. Jim Jordan, R-Ohio, listen to testimony from witnesses during  the House Oversight and Government Reform Committee's hearing on the assault on the U.S. diplomatic mission in Benghazi, Libya, on Capitol Hill in Washington, Wednesday, May 8, 2013. (Drew Angerer for The New York Times)