U.S. Army Pfc. Ana Barraza, McDonald Army Health Center dental assistant, pushes a wheelbarrow full of mulch at the Warwick Pier historical site during Earth Week events at Fort Eustis, Va., April 26, 2013. Volunteers spread mulch in an effort to reconstitute soil lost by erosion over time. (U.S. Air Force photo by Staff Sgt. Wesley Farnsworth / Released)