Diplomatic Security Service agents/Regional Security Officers informed their headquarters in Washington about the attack just as it was beginning at about 9:40 local time (3:40 pm Eastern Time (ET)). At the time, they were informed that the attack was a "terrorist attack".
By 4:30 pm ET, Pentagon officials had informed Defense Secretary Leon Panetta about the attack. The Pentagon ordered an unmanned aerial vehicle that was in the air conducting surveillance on militant camps to fly over Benghazi. The drone arrived at 11:10 pm local time (5:10 pm ET) and began providing a video feed to Washington. At 5:41 pm ET, Secretary of State Hillary Clinton telephoned CIA Director David Petraeus to coordinate.
The CIA, which made up most of the U.S. government's presence in Benghazi, had a ten-member security team at its annex and the State Department believed that this team would assist the consulate in the event of an attack.