Jennifer Armento, 87th Civil Engineering Squadron natural resource ecologist, uses a tabletop model to demonstrate how pollution from streets, housing areas and businesses is washed into the local watershed, contaminating streams and other water sources during. Tyler Ferson, son of Lt. Col. Victor Ferson, 244th Aviation Brigade, and Jennifer Ferson, and Andrew Lara, son of Rebecca and Maj. Erik Lara, 244th Aviation Brigade, watched and asked questions during the demonstrations, a part of McGuire Earth Day April 21 (U.S. Air Force photo/Carlos Cintron)