English: S71-40365 (13 July 1971) --- An aerial view of Pad A, Launch Complex 39, Kennedy Space Center (KSC), showing the 363-feet tall Apollo 15 (Spacecraft 112/Lunar Module 10/Saturn 510) space vehicle sitting on the pad. This photograph was taken during Apollo 15 Countdown Demonstration Test (CDDT) activity. Apollo 15 is scheduled as the fourth manned lunar landing mission by the National Aeronautics and Space Administration (NASA). The crew men will be astronauts David R. Scott, commander; Alfred M. Worden, command module pilot; and James B. Irwin, lunar module pilot. While astronauts Scott and Irwin descend in the Lunar Module (LM) to explore the moon, astronaut Worden will remain with the Command and Service Modules (CSM) in lunar orbit.