President Barack Obama meets with crew members of the Discovery Space Shuttle, from left, Steve Lindsey, Alvin Drew, Michael Barratt, Eric Boe, and Nicole Stott, Monday, May 9, 2011, in the Oval Office of the White House in Washington. (AP Photo/Carolyn Kaster)

Associated Press
President Barack Obama meets with crew members of the Discovery Space Shuttle, from left, Steve Lindsey,  Alvin Drew,  Michael Barratt, Eric Boe, and Nicole Stott, Monday, May 9, 2011, in the Oval Office of the White House in Washington. (AP Photo/Carolyn Kaster)
President Barack Obama meets with crew members of the Discovery Space Shuttle, from left, Steve Lindsey, Alvin Drew, Michael Barratt, Eric Boe, and Nicole Stott, Monday, May 9, 2011, in the Oval Office of the White House in Washington.
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