Former Secretary of State Hillary Clinton says her biggest regret is "what happened at Benghazi."  Speaking at an auto dealers convention in New Orleans, Clinton called it a "terrible tragedy." 

Four Americans were killed in the 2012 terrorist attack on the U.S. consulate in Benghazi, including Ambassador Christopher Stevens.  Clinton also called it a "great loss" for the nation and America's foreign service corps. 

Meantime, Clinton sidestepped a question about whether she plans on making another run for the White House in 2016.  She said, quote, "I'm not thinking about it;  I'm trying to get others not to think about it."  (Metro Networks Inc.)