S72-35610 (21 April 1972) --- Astronaut John W. Young, commander of the Apollo 16 lunar landing mission, deploys the lunar Portable Magnetometer during the first Apollo 16 extravehicular activity (EVA) on the moon, as seen in this reproduction taken from a color television transmission made by the color television camera mounted on the Lunar Roving Vehicle (LRV). While astronaut Thomas K. Mattingly II, command module pilot, remained with the Command and Service Modules in lunar orbit, astronauts Young and Charles M. Duke Jr., lunar module pilot, descended in the Lunar Module to explore the Descartes landing site.