[IMGCAP(1)]In April 1994, five presidents and first ladies gathered in California to pay their respects to President Richard Nixon. From left: Bill Clinton, Hillary Rodham Clinton, George H.W. Bush, Barbara Bush, Ronald Reagan, Nancy Reagan, Jimmy Carter, Rosalynn Carter, Gerald Ford and Betty Ford. Before Nixon’s death, there had been only one other time in U.S. history, from 1861 to 1862, that boasted six living presidents.