STS-55 crewmembers work in the SL-D2 module onboard OV-102

STS055-22-004 (26 April-6 May 1993) --- Four of the seven crew members who spent 10 days aboard the Space Shuttle Columbia are pictured during a brief shift overlap period in the Spacelab D-2 Science Module. Left to right are Jerry L. Ross, Ulrich Walter, Bernard A. Harris, Jr. and Hans Schlegel. Ross, STS-55 payload commander, is changing a sample in a materials processing furnace; Walter, a German payload specialist is in the midst of a baroreflex test and fellow payload specialist Schlegel assists mission specialist and physician Harris with a physiological test at the "Anthrorack".