ELLSWORTH AIR FORCE BASE, S.D. – Tech. Sgt. Todd Rajek, 28th Security Forces Squadron standardization and evaluations manager, uses a power washer to clean an F-111 Aardvark at the South Dakota Air and Space Museum, April 28. The museum will be hosting a visitor appreciation day on May 1 from 8:30 a.m. to 4:00 p.m. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)