A pararescue jumper waits for the hoist line from the U.S. Navy MH-60S Knighthawk helicopter during a field training exercise Sept. 18, 2013 in southern Arizona. The exercise was part of joint training with the U.S. Air Force A-10 Thunderbolt squadrons and Rescue units of Davis-Monthan Air Force Base, Ariz. and the MH-60S Knighthawks of the Helicopter Sea Combat Squadron 23, Naval Air Station North Island, Calif. (U.S. Air Force photo by Airman 1st Class Chris Massey/Released)