Sherry Johnson (left), 633rd Civil Engineer Squadron pollution prevention program manager, assists Gary Nault (right), 633rd CES environmental engineer, with drilling a hole into a barrel while Ronnie Best (middle), 633rd CES environmental engineer, looks on at Joint Base Langley-Eustis, Virginia, April 23, 2019. Besides teaching how to make a rain barrel, the class taught water conservation and preventing pollution. (U.S. Air Force photo by Airman 1st Class Sarah Dowe)