The Space Shuttle Discovery, atop a modified 747, circles the National Mall April 17, 2012. The dome of the National Museum of Natural History is seen in the foreground. (Photo by Chun-Hsi Wong)

Published April 20, 2012 at 461 × 307 in Discovery arrives!
The Space Shuttle Discovery, atop a modified 747, circles the National Mall April 17, 2012. The dome of the National Museum of Natural History is seen in the foreground. (Photo by Chun-Hsi Wong)

The Space Shuttle Discovery, atop a modified 747, circles the National Mall April 17, 2012. The dome of the National Museum of Natural History is seen in the foreground. (Photo by Chun-Hsi Wong)

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