Charles "Charlie" Duke landed on the Moon as the lunar module pilot for Apollo 16 in 1972, he became the tenth and youngest of only twelve people who have walked on the Moon. Today he turns 76.

Apollo 16 was launched from John F. Kennedy Space Center and was the fifth manned lunar landing mission. The crew consisted of John W. Young as commander, Ken Mattingly as command module pilot, and Duke as lunar module pilot. Apollo 16 was the first scientific expedition to inspect, survey, and sample materials and surface features in the Descartes region of the rugged lunar highlands. Duke commenced the then-record setting lunar surface stay of 71 hours and 14 minutes by maneuvering the lunar module Orion to a landing on the rough Cayley Plains.

In three excursions onto the lunar surface, he logged 20 hours and 15 minutes in extravehicular activities involving the emplacement and activation of scientific equipment and experiments, the collection of nearly 213 lb (96 kg) of rock and soil samples, and the evaluation and use of Rover-2 over the roughest surface yet encountered on the moon.