U.S. Marine Corps UH-1Y Venom, right, and the CAL FIRE Bell 407 helicopter, left, collect lake water during the 2017 Wildland Firefighting Exercise (WLFFEX) at Lake O'Neill on Camp Pendleton, Calif., May 4, 2017. The WLFFEX is an annual training event to exercise the firefighting efforts by aviation and ground assests from Marine Corps Installations - West, Marine Corps Base, Camp Pendleton, 3rd Marine Aircraft Wing, Navy Region South West, Third Fleet, CAL FIRE, and San Diego County Sheriff's Department. (U.S. Marine Corps photo by Cpl. Brandon Martinez) - U.S. Marine Corps UH-1Y Venom, right, and the CAL FIRE Bell 407 helicopter, left, collect lake water during the 2017 Wildland Firefighting Exercise (WLFFEX) at Lake O'Neill on Camp Pendleton, Calif., May 4, 2017. The WLFFEX is an annual training event to exercise the firefighting efforts by aviation and ground assests from Marine Corps Installations - West, Marine Corps Base, Camp Pendleton, 3rd Marine Aircraft Wing, Navy Region South West, Third Fleet, CAL FIRE, and San Diego County Sheriff's Department. (U.S. Marine Corps photo by Cpl. Brandon Martinez)