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持久自由行动期间，美国陆军租用的第三方公司 Mi-171 直升机在阿富汗霍斯特省萨勒诺前进基地补给物资。（A civilian-owned Mil-8 helicopter lifts off after U.S. Army Sgt. Rachel Barrett, a combat medic with Headquarters and Headquarters Company, 626th Brigade Support Battalion, 3rd Brigade "Rakkasans," 101st Airborne Division (Air Assault), attached its cargo via sling load at Forward Operating Base Salerno, Afghanistan, Jan. 9, 2013. Sling load operations are used to get supplies and equipment to smaller, less accessible combat outposts.）