The first AWACS aircraft to receive the block 40/45 upgrade sits Nov. 18, 2010, outside the programmed depot maintenance hangar at Tinker Air Force Base, Okla., awaiting pre-checks prior to PDM and the installation of the upgrade.

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Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
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Keywords: air, airforce, force, military, states, united, usa