U.S. ambassador to Libya Chris Stevens was killed along with three others outside the American Consulate in Benghazi in a rocket attack ignited by protesters angry over a film they say insults Prophet Mohammad.

The embassy staffers who also include foreign service information management officer Sean Smith were trying to leave the consulate building when stormed by al Qaeda-linked gunmen and rockets were fired. A Libyan doctor who treated Stevens told the Associated Press the diplomat died of severe asphyxiation from smoke inhalation and that he tried for 90 minutes to revive him. Stevens, 52, was the first U.S. ambassador killed in the line of duty since 1979, when Adolph Dubs, U.S. ambassador to Afghanistan, was gunned down in a kidnapping attempt.

By Wes Hall