Stock Photo - NASA astronaut Doug Hurley, STS-135 pilot, prepares for a flight in a T-38 trainer on his way from Houston to the Kennedy Space Center in Florida for the final Terminal Countdown Demonstration Test (TCDT) on Monday, June 20, 2011. (NASA Photo Houston Chronicle, Smiley N. Pool).

Stock Photo: NASA astronaut Doug Hurley, STS-135 pilot, prepares for a flight in a T-38 trainer on his way from Houston to the Kennedy Space Center in Florida for the final.

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