CAPE CANAVERAL, FL - APRIL 29: Space Shuttle Endeavour STS-134 departs the Operations and Checkout Building in the Astrovan minutes before a launch attempt was scrubbed at the Kennedy Space Center ... more 
CAPE CANAVERAL, FL - APRIL 29: Space Shuttle Endeavour STS-134 departs the Operations and Checkout Building in the Astrovan minutes before a launch attempt was scrubbed at the Kennedy Space Center April 29, 2011 in Cape Canaveral, Florida. Endeavour's final launch, which had been schedualed for 3:47 p.m., has reportedly been delayed by at least 48 hours due to technical problems. (Photo by Tom Pennington/Getty Images) less 
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Getty Images | Photo By Tom Pennington / Getty Images
Fri, Apr 29, 2011 1:12 PM EDT