Spc. Roberto Melendez, an aircraft mechanic with the 2-238th General Support Aviation Battalion, works on a UH-60 Black Hawk at the Shelbyville National Guard armory Nov. 7. For every hour that the aircraft spends in flight, two to three hours of preparation time is required. (Army National Guard photo by Spc. Evan Myers)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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Keywords: flight, maintenance