The Astronauts: Life After the Moon

During his nearly three-day stay on the lunar surface, Duke collected rocks and soil. He also served as the backup lunar module pilot for Apollo 17.
Bettmann / CORBIS

Charlie Duke, Apollo 16, 1972
During his nearly three-day stay on the lunar surface, Duke collected close to 213 lb. of rocks and soil. He also served as the backup lunar module pilot for Apollo 17.