Former astronaut and U.S. Senator John Glenn holds his hand to his heart during the playing of the National Anthem at the transfer ceremony for space shuttle Discovery, Thursday, April 19, 2012, at the Smithsonian’s Steven F. Udvar-Hazy Center. (Photo by NASA/Paul E. Alers)

Former astronaut and U.S. Senator John Glenn holds his hand to his heart during the playing of the National Anthem at the transfer ceremony for space shuttle Discovery, Thursday, April 19, 2012, at the Smithsonian's Steven F. Udvar-Hazy Center. (Photo by NASA/Paul E. Alers)

Former astronaut and U.S. Senator John Glenn holds his hand to his heart during the playing of the National Anthem at the transfer ceremony for space shuttle Discovery, Thursday, April 19, 2012, at the Smithsonian’s Steven F. Udvar-Hazy Center. (Photo by NASA/Paul E. Alers)

Former astronaut and U.S. Senator John Glenn holds his hand to his heart during the playing of the National Anthem at the transfer ceremony for space shuttle Discovery, Thursday, April 19, 2012, at the Smithsonian’s Steven F. Udvar-Hazy Center. (Photo by NASA/Paul E. Alers)

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