Apollo 15 was the fourth mission to land astronauts on the Moon.
The three Apollo 15 prime crew members can be seen inside the Apollo 15 Command Module (CM) during simulation training at the Kennedy Space Center (KSC). Astronaut David R. Scott, commander, is in the background to the left. Astronaut Alfred M. Worden, center foreground, is the command module pilot. Out of view, to the right background, is astronaut James B. Irwin, lunar module pilot.