TRIPOLI, Libya --Libyan leader Muammar al-Qaddafi survived a NATO missile strike Saturday that killed his youngest son and three grandchildren and wounded friends and relatives, Libya's spokesman said. Qaddafi and his wife were in the Tripoli house of his 29-year-old son, Saif al-Arab Qaddafi, when it was hit by at least one missile fired by a NATO warplane, according to Libyan spokesman Moussa Ibrahim. "The leader himself is in good health," Ibrahim said. "He was not harmed. The wife is in good health.