Reusable bags made of recycled material hang on the park fence at the Outdoor Recreation Campground as 93rd Signal Brigade Soldiers cleaned the area in support of Earth Week at Fort Eustis, Va., April 23, 2013. More than 230 volunteers joined environmental protection officials at Langley Air Force Base and Fort Eustis in a series of clean-up and educational projects on each installation. (U.S. Air Force photo by Airman 1st Class R. Alex Durbin/Released)