MORE FROM BARBARA WALTERS' INTERVIEWS: CLINTON ON LIFE AFTER THE CABINET, HER DARKEST MOMENT IN THE JOB. Hillary Clinton made one thing abundantly clear in her interview: she is definitely leaving the Cabinet as soon as a new secretary is sworn in and a smooth transition occurs. "It sounds so simple, but I've been, as you know, at the highest levels of American and now international activities for twenty years, and I just thought it was time to take a step off … maybe do some reading and writing and speaking and teaching," she told Walters. Her darkest moment as secretary of State happened this year when terrorists in Libya attacked the U.S. consulate in Benghazi on September 11th, killing four Americans, including U.S. Ambassador Chris Stevens. Clinton called the attack the "worst time" in her tenure. "It's something that is certainly terrible," she said. "We take risks in the work we do. The people who do this work are often in very threatening environments, whether it's our military or our civilian people around the world, I have just the most extraordinary admiration for them." http://abcn.ws/UEzFkI NOTED: CLINTON'S HAIRSTYLING ROUTINE. "I do not travel with any hairdresser, or anybody, to help me do that, and I'm not very competent myself. I've been admitting that for years, which should be obvious to everyone," Clinton joked to Walters in a conversation that she referred to as "girl talk." "And so it became simpler to just grow it so that I can pull it back, and I can stick rollers in."