SEYMOUR JOHNSON AIR FORCE BASE, N.C. - Technical Sgt. Noal Yarnes, 4th Equipment Maintenance Squadron, works with Senior Airman Ryan Morgan, 336th Aircraft Maintenance Unit, to load ammunition onto an aircraft during an operational readiness exercise March 18. The purpose of the exercise is to evaluate the 4th Fighter Wing's ability to survive and operate (ATSO), employ aircraft and resources, and conduct mission support activities in a steady state combat environment, and to provide training opportunities to improve on existing capabilities. (U.S. Air Force photo by Senior Airman Chad Trujillo)