NASA Photo ID: S69-34337, 69-H-758
Date Taken: 05/06/69

Apollo 10 Astronauts John W. Young (left), command module pilot; and Thomas P. Stafford, commander, leave the Kennedy Space Center's (KSC) Manned Spacecraft Operations Building for Pad B, Launch Complex 39, where they participated in dry portion of Countdown Demonstration test.

Source: scan by JL Pickering