Crew chiefs from the 509th Aircraft Maintenance Squadron and 131st Bomb Wing perform a phase inspection on a Air Force B-2 Spirit bomber aircraft at Whiteman Air Force Base, Mo., July 12, 2012. Every 1,000 flight hours the B-2 must be ‘phased’ in search of any discrepancies that could cause major damage. Senior Airman Nick Wilson

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Photo credit: © Z2A1 / Alamy / Afripics
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Keywords: -2, .., 509th, air, aircraft, aviation, bomb, bomber, chiefs, crew, defense, force, military, united, war, wing