S84-36958 (29 June 1984) --- Astronaut Robert L. Crippen, 41-G crew commander, perches nearby an underwater simulation scene in the Johnson Space Center's weightless environment training facility (WET-F). Purpose of the rehearsal was to train two of the 41-G crew's mission specialists for a scheduled extravehicular activity (EVA). Out of frame are Astronauts Kathryn D. Sullivan, Jon A. McBride and David Leestma. Dr. Sullivan and Leestma donned extravehicular mobility units
(EMU) for the simulation while Crippen and McBride monitored the activity. This photograph was taken by Otis Imboden.