Airman 1st Class Isaiah Davis, 89th Operations Support Squadron airfield manager, checks the functionality of a runway signal at Joint Base Andrews, Md., June 7, 2017. The sign communicates to the arriving aircrew that a part of the flightline is closed due to construction and helps prevent accidents.

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Size: 1633px × 1225px
Photo credit: © Dudley Little / Alamy / Afripics
License: Licensed
Model Released: No

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