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John Watts Young (born September 24, 1930) is a former NASA astronaut who walked on the Moon on Apollo 16, April 21, 1972.
Young was assigned to the backup crew on Apollo 7 and later made the second manned flight to the Moon on Apollo 10 with Thomas Stafford and Eugene Cernan.
Young was back-up commander of Apollo 13, the troubled mission in which the moon landing was aborted because of an explosion on the service module.