UPDATED 3:49 AM EST, December 20, 2012
WASHINGTON (AP) — Lawmakers want to know why security was "grossly inadequate" at the U.S. diplomatic mission in Libya when militants stormed the facility on Sept. 11, killing the ambassador and three other Americans, and why the military failed to respond faster during the nine-hour assault.
Members of the Senate and House foreign affairs committees on Thursday were to question Deputy Secretary of State William Burns, who is in charge of policy, and Deputy Secretary of State Thomas Nides, who is in charge of management, at back-to-back congressional hearings.
