Airmen from the 621st Contingency Response Wing attempt to hook up cargo to a U.S. Army UH-60 Black Hawk helicopter from the 1-150th Assault Helicopter Battalion during sling-load training at Joint Base McGuire-Dix-Lakehurst, N.J., April 1, 2015. The training allows the Army pilots and crew members and Air Force Airmen to stay proficient with sling-load operations. (U.S. Air Force photo/Staff Sgt. Gustavo Gonzalez/RELEASED)