A U.S. Air Force F-16 Fighting Falcon pilot assigned to Kunsan Air Base, Republic of Korea, uses hand signals to communicate during Red Flag-Alaska at Eielson Air Force Base, Alaska, Aug. 2, 2017. RF-A provides an optimal training environment in the Indo-Asia Pacific region and focuses on improving ground, space and cyberspace combat readiness and interoperability of U.S. and international forces. (U.S. Air Force photo by Staff Sgt. Joshua Rosales)