Payload Commander, Bonnie Dunbar working onboard STS-50 USML-1

Payload Commander, Bornie Dunbar loading samples in the CGF onboard STS-50, USML-1.

STS-50 Onboard photo: Payload Commander Bornie Dunbar unloading the SACA.

Payload Commander, Bornie Dunbar activating ZCG autoclave onboard STS-50, USML-1

Onboard Space Shuttle Columbia (STS-50) payload commander Bornie Dunbar performs life science experiments on crewmember payload specialist Lawrence Delucas in the United States Microgravity Laboratory (USML-1) science module.

Onboard Space Shuttle Columbia (STS-50) all work and no play make commander Richard (Dick) Richards and payload commander Bornie Dunbar take a break from their work in the United States Microgravity Laboratory (USML-1) responsibilities.

Onboard Space Shuttle Columbia (STS-50) crewmembers rally around the American flag in the United States Microgravity Laboratory-1 (USML-1). Pictured are (from top, left to right) pilot Kerneth D. Bowersox; payload specialist Lawrence J. Delucas; commander Richard N. Richards; payload commander Bonnie J. Dunbar; mission specialists Carl J. Meade and Ellen S. Baker; and payload specialist Eugene H. Trinh.