A U.S Marine Corps MV-22B Osprey tiltrotor aircraft with Marine Medium Tiltrotor Squadron (VMM) 163, Marine Aircraft Group (MAG) 16, 3rd Marine Aircraft Wing (MAW) from Marine Corps Air Station Miramar, Calif. prepares to take off from Marine Corps Air Station Yuma, Ariz. on Dec.10, 2013 during exercise Steel Knight (SK-14). SK-14 is a large-scale combined arms, live-fire exercise integrating ground troops from 1st Marine Division, aviation and logistical support from 3rd MAW and 1st Marine Logistics Group to ensure that our nation is fully prepared for employment as a maneuver force across the range of military operations. (U.S. Marine Corps photo by Cpl. Tyler C. Gregory, 3rd MAW Combat Camera/Released)