U.S. Air Force Senior Airman Kelly Bollinger, a C-17 Globemaster III aircraft loadmaster assigned to the 517th Airlift Squadron, performs an in-flight aircraft check during Cope Tiger 13 over Udon Thani Royal Thai Air Force Base, Thailand, March 15, 2013. Cope Tiger is an annual multilateral aerial exercise designed to improve readiness and cooperation between U.S., Thai and Singaporean forces. (U.S. Air Force photo by 2nd Lt. Jake Bailey/Released)