Senior Airman Benjamin Amirault, 28th Civil Engineer Squadron structures technician, washes poly-metal prior to adhering a printed sign at Ellsworth Air Force Base, S.D., Aug. 15, 2013. Airmen of the 28th CES sign shop produce approximately 720 signs per year to supply Ellsworth with road, building, and safety markings. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)