Page "STS-8" Paragraph 13
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The commander, Truly, was the only veteran astronaut of the crew, having flown as the pilot on STS-2 in 1981 and for two of the Approach and Landing Tests aboard Enterprise in 1977.
Prior to this, he had worked as a capsule communicator for all three Skylab missions and the Apollo-Soyuz mission.
Brandenstein, Gardner and Bluford had all been recruited in 1978, and been training for a mission since 1979.
The mission had originally been planned for a crew of four, with Thornton added to the crew as a third mission specialist in December 1982, eight months after the crew was originally named.
His participation on the mission included a series of tests aimed at gathering information on the physiological changes linked with Space Adaptation Syndrome, more commonly known as " space sickness "; this had become a focus of attention in NASA, as astronauts succumbed to it during Shuttle missions.
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