C-17 unloads UH-60 helicopters
131206-Z-NJ721-048 A pair of UH-60 Medevac Black Hawk helicopters from the 3-238 General Support Aviation Battalion are unloaded from a C-17 Globemaster III at Selfridge Air National Guard Base, Mich., Dec. 6, 2013. after returning from service in Afghanistan. The helicopters have returned from service in Afghanistan for maintenance and modifications which will upgrade them to a more comprehensive and modern medical care aircraft known as the HH-60. (U.S. Air National Guard photo by TSgt. Robert Hanet/Released)