They are an American family like none other. Their accomplishments have made history, and their tragedies have left scars on the nation's soul. They are the Kennedys, and while their family history would have inspired Shakespeare, it has instead become the life's labor of author Laurence Leamer. "It's finally time to see the Kennedys in perspective. And it's time for the Kennedys to stand up and dare to speak truthfully, and with depth, about their lives," says Leamer. Correspondent Lesley Stahl talks to six members of the Kennedy family in this special 48 Hours report.