Colonel Gaddafi becomes Libyan leader.

First trial flights of Concorde, the Anglo-French supersonic airliner

Richard M. Nixon is inaugurated 37th president of the U.S. (Jan. 20).

 Stonewall riot in New York City marks beginning of gay rights movement (June 28).

Apollo 11 astronauts - Neil A. Armstrong, Edwin E. Aldrin, Jr., and Michael Collins - take man's first walk on moon (July 20).