At NASA's Kennedy Space Center Launch Pad 39A, STS-131 Commander Alan Poindexter, in the orange suit, prepares to enter space shuttle Discovery from the pad's White Room during the practice countdown ... more 
At NASA's Kennedy Space Center Launch Pad 39A, STS-131 Commander Alan Poindexter, in the orange suit, prepares to enter space shuttle Discovery from the pad's White Room during the practice countdown known as the Terminal Countdown Demonstratio less 
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SPACE.com | Photo By NASA/Scott Andrews
Tue, Jul 3, 2012 10:01 AM EDT