Robert F. Kennedy Jr., whose anti-vaccine activism alienated him from much of his family, said he isn't convinced that a lone gunman was solely responsible for his uncle's killing.

President John F. Kennedy waves from his car Nov. 22, 1963, in a motorcade in Dallas with first lady Jacqueline Kennedy, right, Nellie Connally, second from left, and her husband, Texas Gov. John ...

Civil and voting rights activists gathered in Jackson, Mississippi, to honor what would have been the 100th birthday of civil ...

Secretary Robert F. Kennedy Jr. has opened a new chapter of federal vaccine policy that invites questions on issues long ...