Josh Rogin reports:

The Sept. 11 attack on the U.S. consulate in Benghazi was in fact "a terrorist attack" and the U.S. government has indications that members of al Qaeda were directly involved, a top Obama administration official said Wednesday morning. "I would say yes, they were killed in the course of a terrorist attack on our embassy," Matt Olsen, the director of the National Counterterrorism Center, said Wednesday at a hearing of the Senate Homeland Security Committee, in response to questioning from Chairman Joe Lieberman (I-CT) about the attack that killed Ambassador Chris Stevens and three other Americans. As for who was responsible, Olsen said it appears there were attackers from a number of different militant groups that operate in and around Benghazi, and said there are already signs of al Qaeda involvement. "We are looking at indications that individuals involved in the attack may have had connections to al Qaeda or al Qaeda's affiliates; in particular, al Qaeda in the Islamic Maghreb," he said.