A Republic of Singapore air force F-15 (front) sits across from a U.S. Air Force F-15 after completing a training mission during exercise Cope Tiger 17 at Korat Royal Thai Air Force Base, Thailand, March 24, 2017. The annual multilateral exercise, which involves a combined total of 76 aircraft and 43 air defense assets, is aimed at improving combined combat readiness and interoperability between the Republic of Singapore air force, Royal Thai air force, and U.S. Air Force, while concurrently enhancing the three nations' military relations. (U.S. Air Force photo by Staff Sgt. Kamaile Chan)