Members of the Kentucky Air National Guard use all-terrain vehicles to conduct an airfield assessment at Fort Campbell, Ky., during an earthquake-response exercise May 14, 2012. About 20 Airmen examined all aspects of Campbell Army Airfield for simulated earthquake damage, determined the kinds of airlift operations the facility could support and opened the ramp for incoming relief and aeromedical evacuation flights within five hours of being called to duty. (U.S. Air Force photo by Senior Airman Maxwell Rechel)