Detail shot of a 1,500 Reverse Osmosis Water Purification Unit (ROWPU) operated by U.S. Air Force water & fuels systems craftsmen, 433d Civil Engineer Squadron, Lackland, Air Force Base, Texas. The ROWPU produces all the water for personnel based at the Young Air Assault Strip, May 5, 2014 during Exercise Patriot Warrior at Fort McCoy, Wis. United States military reserve components from all branches participate in combined exercises Patriot Warrior, Global Medic, Diamond Saber and CSTX in preparation for upcoming deployments in joint environments. (U.S. Air Force photo by Master Sgt. Francisco V. Govea II/ Released)