191211-M-ZM399-1007 KIN BLUE, Okinawa (Dec. 11, 2019) Seaman Jose Valenzuela tests the potability of water during a Command Post Exercise at Kin Blue, Okinawa, Japan, Dec. 11, 2019. Marines with 3rd Marine Logistics Group trained to increase their proficiency and readiness for operations in tactical environments during their annual CPX. Valenzuela, a corpsman with Combat Logistics Regiment 37, 3rd MLG, is a native of Sierra Vista, Arizona. (U.S. Marine Corps photo by Lance Cpl. Terry Wong/Released)