Senior Airman Juan Valencia, 28th Civil Engineer Squadron water and fuel systems technician, collects weeds during a base-wide project at Gateway Lake at Ellsworth Air Force Base, S.D., June 24, 2015. The 28th CES sent out a team of 10, marking the first day of the week-long project in an effort to protect local animals and plant life. (U.S. Air Force photo by Airman Sadie Colbert/Released)