Last updated on April 20, 2014 at 5:20 EDT
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May 31, 2011
The STS-27 astronauts pose for a crew portrait on the flight deck of the Earth-orbiting Space Shuttle Atlantis. Pictured, from the left, are astronauts Robert L. Gibson, commander; Richard M. (Mike) Mullane, Jerry L. Ross and William M. Shepherd, all mission specialists, and Guy S. Gardner, pilot.