U.S. Marine Corps Lance Cpl. Matthew R. Davidson, a water support technician with Headquarters and Service Company, Combat Logistics Battalion 6 (CLB-6), 2nd Marine Logistics Group, purifies river water using the Lightweight Water Purification System at Mountain Warfare Training Center (MWTC), Bridgeport, California, October 20, 2014. CLB-6 stayed at MWTC to attend the basic mobility course and to provide logistical support to 2nd Battalion 5th Marine Regiment, 1st Marine Division. (U.S. Marine Corps photo by Cpl. Desire M. Mora/Released)