A photo provided by NASA shows the Endeavour at NASA Kennedy Space Center's Launch Pad 39A, in Cape Canaveral, Fla., May 4, 2011. NASA will try Monday, May 16. 2011 to launch Endeavour on the ... more 
A photo provided by NASA shows the Endeavour at NASA Kennedy Space Center's Launch Pad 39A, in Cape Canaveral, Fla., May 4, 2011. NASA will try Monday, May 16. 2011 to launch Endeavour on the penultimate space shuttle flight, after replacing a switch box and plugging in new electrical wiring. less 
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Associated Press
Tue, May 10, 2011 4:51 AM EDT