YIGO, Guam—Airman 1st Class David Hall, 36th Civil Engineer Squadron electrical power production technician, checks an outer fence for loose debris during a school beautification project at the Machananao Elementary School in Yigo, Guam, Aug. 14, 2013. Volunteers from Andersen Air Force Base joined forces with U.S. Army units to clean up debris, pressure-wash and repaint the walls, fence and entrance ways of Machananao Elementary before students return from summer break. (U.S. Air Force photo by Staff Sgt. Benjamin Wiseman/Released)