STS-55 German payload specialists Walter and Schlegel work in SL-D2 module

STS055-106-056 (26 April-6 May 1993) --- Ulrich Walter, one of two payload specialists representing the German Aerospace Research Establishment (DLR) onboard Columbia, plants his socked feet into temporary foot restraints. Walter's headwear telltales his participation in a Tissue experiment. Fellow payload specialist Hans Schlegel prepares to take a photo in the background.