Staff Sgt. Eric Barnes and Airman 1st Class Lester Popham close an inlet bell mouth for a B-2 Spirit engine inside the test cell Feb. 13, 2013, at Whiteman Air Force Base, Mo. The inlet bell mouth distributes and guides air into the motor to allow the engine to run smoothly in the test cell. Barnes is the 509th Maintenance Squadron test cell assistant section chief. Popham is assigned to the 509th MXS aerospace propulsion apprentice. Staff Sgt. Nick Wilson

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Photo credit: © Z2A1 / Alamy / Afripics
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Keywords: .., air, base, command, defense, force, global, military, mo., strike, united, war, whiteman