U.S. Marine Corps Cpl. Justin Hagstrom, a crewmaster

U.S. Marine Corps Cpl. Justin Hagstrom, a crewmaster with Marine Aerial Refueler Transport Squadron (VMGR) 152, watches a U.S. Army MH-60 Black Hawk with the 160th Special Operations Aviation Regiment (SOAR) conduct night air-to-air refueling during unit-level training called El Centro Horizon at Naval Air Facility El Centro, California, Dec. 6, 2017. VMGR-152 and 160th SOAR performed MH-60 Black Hawk helicopter air-to-air refueling during the night at low altitudes with covert aircraft lighting, aided with night vision imaging systems. (U.S. Marine Corps photo by Cpl. Carlos Jimenez)