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NASA astronauts and Smithsonian VIP's pose for a group photo in front of both Space Shuttles, Enterprise and Discovery at the conclusion of the Welcome Discovery Ceremony at the Smithsonian's Udvar-Hazy Center on April 19, 2012.   Mike Lynaugh

NASA astronauts and Smithsonian VIP's pose for a group photo in front of both Space Shuttles, Enterprise and Discovery at the conclusion of the Welcome Discovery Ceremony at the Smithsonian's Udvar-Hazy Center on April 19, 2012.

Mike Lynaugh