Today in history: On May 16, 1966, the Chinese Communist Party issued the May 16 Notification, a document that criticized “counterrevolutionary revisionists” within the party and marked the beginning of the Cultural Revolution. Also on this date: In 1770, Marie Antoinette, age 14, married the future King Louis XVI of France, who was 15. In 1868, having already been impeached by the House of Representatives, President Andrew Johnson narrowly avoided impeachment by the Senate, which voted 35-19