Spangdahlem energy audit
A-10 Thunderbolt II aircraft from the 81st Fighter Squadron wait on Ramp 4 at Spangdahlem Air Base, Germany, July 5. Siemens, an energy service company, is currently completing an investment-grade audit at the base to determine the best opportunities to save energy at the installation. (U.S. Air Force photo/Airman 1st Class Dillon Davis)