UPDATE 1-U.S. Air Force sets stage for new contest to build GPS satellites

CAPE CANAVERAL, Fla., May 10 (Reuters) - The U.S. Air Force

has set the stage for a contest to build its next batch of GPS 3

satellites, giving rivals Boeing Co and Northrop Grumman

Corp a chance to wrest work worth billions of dollars

from Lockheed Martin Corp.

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