J. Christopher Stevens, U.S. ambassador to Libya, dies at 52Mr. Stevens had served in Israel, Egypt, Syria and Saudi Arabia, but Libya became the center of his career. He served there three times, beginning in the years before Gaddafi fell, when the mercurial leader was trying to repair decades of poor relations with Washington. Mr. Stevens was the No. 2 U.S. diplomat in Libya from 2007 to 2009.