U.S. Marines with Marine Wing Support Squadron (MWSS) 374, Marine Aircraft Group (MAG) 16, 3rd Marine Aircraft Wing (MAW) utilize an MK31 tractor and an MK970 refueler to fuel a UH-1Y Venom helicopter with Marine Light Attack Helicopter Squadron (HMLA) 267, MAG-39, 3rd MAW aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif. on Dec. 11, 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)