September 19 -- Director of the National Counterterrorism Center Matthew Olson, responding to a question by Senate Homeland Security and Governmental Affairs Chairman Joe Lieberman on whether the attack was a terrorist attack:
"They were killed in the course of a terrorist attack on our embassy. ... At this point, what I would say is that a number of different elements appear to have been involved in the attack, including individuals connected to militant groups that are prevalent in eastern Libya, particularly the Benghazi area, as well we are looking at indications that individuals involved in the attack may have had connections to al Qaeda or al Qaeda affiliates, in particular al Qaeda in the Islamic Maghreb." Olson also said U.S. officials had no "specific evidence of significant advanced planning."
September 20 -- Jay Carney:
"It is, I think, self-evident that what happened in Benghazi was a terrorist attack. Our embassy was attacked violently, and the result was four deaths of American officials."
September 20 -- President Obama at a town hall meeting organized by the Spanish-language Univsion Network, responding to a question about the possible involvement of al Qaeda:
"What we do know is that the natural protests that arose because of the outrage over the video were used as an excuse by extremists to see if they can also directly harm U.S. interests."
September 21 -- Hillary Clinton:
"What happened in Benghazi was a terrorist attack, and we will not rest until we have tracked down and brought to justice the terrorists who murdered four Americans."
September 25 -- President Obama on ABC's The View," in response interviewer Joy Behar's question, "I heard Hillary Clinton say it was an act of terrorism. Is it? What do you say?":
"We're still doing an investigation. There's no doubt that (with) the kind of weapons that were used, the ongoing assault, that it wasn't just a mob action. We don't have all the information yet, so we're still gathering it. But what's clear is that around the world there's still a lot of threats out there." Obama also said "extremist militias" were suspected to have been involved.