GROUND EXERCISE As seen through a night-vision device, airmen respond to a ground attack during Beverly Midnight 13-03, an operational readiness exercise on Osan Air Base, South Korea, Aug. 8, 2013. The exercise is designed to test the base's ability to defend and execute the mission in a heightened state of readiness. The airmen are members of the 51st Security Forces Squadron. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 138820-R-OYL47-315.jpg Photo Gallery