January 27, 2014, 12:46 pm Hillary: Benghazi 'my biggest regret' By Julian Pecquet Getty Images Hillary Clinton called the Benghazi terror attack the “biggest regret” of her tenure as secretary of State on Monday, a message she's expected to emphasize as she ponders a 2016 White House run. “My biggest, you know, regret is what happened in Benghazi,” Clinton said when asked to identify “do-overs” of her time as America's top diplomat during her keynote appearance before the the National Automobile Dealers Association in New Orleans. [WATCH VIDEO] “It was a terrible tragedy, losing four Americans, two diplomats and now...