Seen from a tower at the Washington National Cathedral, the NASA Space Shuttle Discovery is seen being carried piggyback on a modified Boeing 747, above the National Shrine of the Immaculate Conception in Washington, D.C.,Tuesday, April 17, 2012, as it makes it's way to the Steven F. Udvar-Hazy Center in Chantilly, Va. (Rod Lamkey Jr/The Washington Times)
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