Shuttle Endeavor leti posljednji put

CAPE CANAVERAL, FL - APRIL 28: The Space Shuttle Endeavour STS-134 sits on launch pad-39A at the Kennedy Space Center April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Eliot J. Schechter/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: The Space Shuttle Endeavour STS-134 sits on launch pad-39A at the Kennedy Space Center April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Eliot J. Schechter/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: Photographers set up remote cameras near Space Shuttle Endeavour STS-134 as it sits on launch pad-39A at the Kennedy Space Center April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Eliot J. Schechter/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: Photographers set up remote cameras near Space Shuttle Endeavour STS-134 as it sits on launch pad-39A at the Kennedy Space Center April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Eliot J. Schechter/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: Space Shuttle Endeavour sits on Pad-39A on on Pad-39A on April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Tom Pennington/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: Space Shuttle Endeavour sits on Pad-39A on on Pad-39A on April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Tom Pennington/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: Still photographers prepare remote cameras at the base of Space Shuttle Endeavour on Pad-39A on April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Tom Pennington/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: Space Shuttle Endeavour sits on Pad-39A on April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Tom Pennington/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

CAPE CANAVERAL, FL - APRIL 28: The Space Shuttle Endeavour STS-134 sits on launch pad-39A at the Kennedy Space Center April 28, 2011 in Cape Canaveral, Florida. NASA continues to prepare for the last trip to orbit for Space Shuttle Endeavour, which will be launching on April 29. Eliot J. Schechter/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==