The Space Shuttle Orbiter Columbia rolls out to Launch Pad 39A is the primary payload on this flight.

Under a clear blue sky that is reflected in the water of the turn basin, the Space Shuttle Orbiter Columbia rolls out to Launch Pad 39A in preparation for the STS-83 mission.Tthe Microgravity Science Laboratory-1 (MSL-1) Spacelab module is the primary payload on this 16-day space flight. The MSL-1 will be used to test some of the hardware, facilities and procedures that are planned for use on the International Space Station while the seven-member flight crew conducts combustion, protein crystal growth and materials processing experiments.