(07/14/1971) - Apollo 15 Command Module Pilot Alfred M. Worden undergoes spacesuit pressure checks prior to participating in the space vehicle Countdown Demonstration Test. Lunar Module Pilot James B. Irwin is visible in the rear while David R. Scott, the Commander for Apollo 15, is not shown. The test is a rehearsal in preparation for the scheduled Moon mission, scheduled no earlier than July 26, 1971.