Today in history:

The Monterey Pop Festival concludes.

25 people were killed when a twin-engine plane and helicopter carrying sightseers collided over the Grand Canyon.

U.S. Air Force Douglas C-124 Globemaster II crashed near Tokyo, killing all 129 people on board. 

Sally K. Ride became America's first woman in space

Columbia Records publicly unveiled its new long-playing phonograph record in New York.

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