ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Michael Obringer, 28th Maintenance Squadron aircrew egress systems journeyman, checks behind him as he rides an all-terrain vehicle in reverse at the Buffalo Gap National Grasslands, S.D., July 7. When riding an ATV, Airmen should always be aware of the surrounding area. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)