Terence P. Jeffrey is investigative editor for the Daily Caller News Foundation.

It happened exactly 11 years after the 9/11 terrorist attacks on the United States.

Chris Stevens, the U.S. ambassador to Libya, was visiting the State Department’s mission in the Libyan city of Benghazi, where the CIA also maintained a nearby Annex.

On Jan. 15, 2014, the Senate Select Committee on Intelligence published a detailed report on the terrorist attack made against these U.S. facilities on the night of Sept. 11, 2012.

At 9:42 p.m.—as recorded by a surveillance camera—”armed attackers advanced toward the U.S. compound,” and “a local police vehicle” that had been stationed outside the compound pulled away. Some of these attackers climbed over the mission’s gate and then opened it.

“Over the course of the entire attack on the Mission facility,” said the committee’s report, “at least 60 different attackers entered the U.S. compound and can be seen on the surveillance video recovered from the Mission facility.”

“Ambassador Chris Stevens was in the residence of the Main Building (‘Building C’), along with a Diplomatic Security agent, and Information Management Officer Sean Smith,” said the report. “The three of them proceeded to the ‘safe area’ in the building.”

Then, diplomatic security agents “contacted CIA personnel at the Annex to ask for assistance.”

But within three minutes of entering this State Department property, the terrorists had begun to destroy it.

“After entering the Mission facility, the attackers used diesel fuel to set fire to the barracks/guard house of the Libyan 17th February Brigade militia, which served as a security force provided by the host nation for the Mission compound, and then proceeded towards the main buildings of the compound.”