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bd-dfrc-p019.html%23.VK12UHtRKBQ
bd-dfrc-p019.html%23.VK12UHtRKBQ
http://www.nasa.gov/centers/armstrong/news/Biographies/Pilots/bd-dfrc-p019.html%23.VK12UHtRKBQ
Joseph A. Walker
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Joseph A. Walker
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bd-dfrc-p019.html%23.VK12UHtRKBQ
http://www.nasa.gov/centers/armstrong/news/Biographies/Pilots/bd-dfrc-p019.html%23.VK12UHtRKBQ