More in U.S|Ambassador, 3 others killed in LibyaObama on Libya attack: “Justice will be done”Libya doctor: U.S|He graduated from the University of California, Berkeley, in 1982 and received a law degree from the University of California’s Hastings College of the Law in San Francisco in 1989, according to the State Department}

(CBS/AP) The American ambassador who was killed Tuesday in an attack on the U.S. Consulate in Libya had represented U.S. interests in the nation under two presidents and worked as a diplomat for more than 20 years.

Ambassador Christopher Stevens, U.S. Foreign Service officer Sean Smith and two other Americans died when an unruly mob attacked the consulate in the port city of Benghazi.

Stevens became the sixth ambassador in U.S. history to die in an attack, 청양출장샵 CBS News correspondent Nancy Cordes reports. He is the first U.S. ambassador to be killed since 1979, when Ambassador Adolph Dubs was killed in Afghanistan.