“I’m sixty-two now, and I’ve been in the public eye for more than 30 years,” Jacqueline Kennedy Onassis told a friend in 1991. “I can’t believe anybody still cares about me or is interested in what I do.” How wrong she was. At 31, she was the youngest American First Lady of the 20th century. She lived in the White House only from 1961 to 1963, yet remained an object of admiration, and even obsession, until the day she died.