By Ed Payne
In the months leading up to his death, U.S. Ambassador to Libya Chris Stevens worried about what he called the never-ending security threats in Benghazi and mentioned his name was on an al Qaeda hit list, a source familiar with his thinking told CNN
Stevens specifically mentioned a rise in Islamic extremism and al Qaeda's growing presence in Libya, the source said.
American intelligence officials are investigating, but Matthew Olsen, the National Counterterrorism Center director, said Wednesday that it was unlikely that Stevens and his security team were killed by random protesters.
"I would say, yes, they were killed in course of terrorist attack on our embassy," Olsen said at a Senate Homeland Security hearing.
Stevens and three other Americans were killed when protesters, angry over a film made in the United States that mocked the Muslim prophet Mohammed, attacked the U.S. Consulate in Benghazi.