Astronauts Guion Bluford and William Thornton performing experiments on One-G trainer. July 28, 1983.
Photo courtesy of NASA.Suggested Reading
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Astronauts Guion Bluford and William Thornton performing experiments on One-G trainer. July 28, 1983.
Photo courtesy of NASA.©2009 About.com, a part of The New York Times Company.
All rights reserved.