Staff Sgt. James Brown, 10th Intelligence Squadron systems planner, throws away debris in a field at Langley Air Force Base, Va., April 22, 2011. Joint Base Langley-Eustis will celebrate Earth Day at both Langley AFB and Fort Eustis in a series of eco-friendly events, including clean-up and beautification projects, reforestation and plantings, and storm drain marker installations. (U.S. Air Force photo by Staff Sgt. Jeff Nevison/Released)