S75-28485 (12 July 1975) --- Astronaut Vance D. Brand, command module pilot of the American ASTP prime crew, practices operating a Docking Module hatch during Apollo-Soyuz Test Project preflight training at NASA's Johnson Space Center. The Docking Module is designed to link the Apollo and Soyuz spacecraft during their docking mission in Earth orbit. Gary L. Doerre of JSC?s Crew Training and Procedures Division is working with Brand. Doerre is wearing a face mask to help prevent possible exposure to Brand of disease prior to the ASTP launch.