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May 30, 2011
The Space shuttle orbiter 101 Enterprise approaches riding atop its 747 carrier aircraft, arrives at the Redstone Arsenal airstrip near Marshall Space Flight Center (MSFC), Huntsville, Alabama, on March 13, 1978. It is to undergo ground vibration tests along with the external tank and solid rocket boosters, in preparation for Orbiter Flight Tests (OFT) in which its successor craft (Orbiter 102) will take several two-man crews into earth orbit. Photo credit: NASA or National Aeronautics and Space Administration