Apollo 16 Moon Walker Reflects on 50th Anniversary

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Charlie Duke is part of a tiny fraternity that's getting even smaller: People who walked on the moon. Duke, 86, visited his Apollo 16 spaceship on Wednesday at the U.S. Space and Rocket Center to mark the 50th anniversary of his one and only trip to the lunar surface. Only four of the 12 U.S. astronauts who walked on the moon are still alive, and Duke stays busy with speaking engagements. (April 21) AP