From left to right Staff Sgt. Anthony Rezac and Tech. Sgt. Donald Clarke, both of the 119th Civil Engineer Squadron, hold sand-point water filtration equipment in the sand and water of the Gulf of Mexico on the shore of Tyndall Air Force Base, Fl., April 1, 2014. Clarke and Rezac are participating in a training class demonstrating how the U.S. Military can desalinate sea-water and convert it into potable water suitable for drinking. (U.S. Air National Guard photo by SMSgt. David H. Lipp/Released)