In this artist's depiction provided by Northrop Grumman Corp., a KC-45A refuels a B-2 stealth bomber. The Air Force on Friday, Feb. 29, 2008, awarded Northrop Grumman Corp. and a European partner a $35 billion contract to build airborne refueling planes, delivering a major blow to Boeing Co. The Northrop-EADS refueling tanker, the KC-45A, "will revolutionize our ability to employ tankers and will ensure the Air Force's future ability to provide our nation with truly global vigilance, reach, and power," Air Force Gen. Duncan J. McNabb said in a statement. (AP Photo/Northrop Grumman Corp)

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