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Charlie Walker Charlie became an astronaut in a unique manner. He trained astronauts on STS 4,6,7, & 8 in the operation of an electrophoresis machine, a biomedical apparatus which was the first production device to take advantage of prolonged weightlessness. He was its most skilled operator. Working at NASA contractor McDonnell-Douglas on space shuttle propulsion, he was intimately familiar with the shuttle. NASA decided to fly him on three shuttle flights to operate the complex machinery himself, as a payload specialist.SPACEFEST 2009 AUTOGRAPH FEES (Fri-Sun)
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