People's Liberation Army Senior Col. Hua Bo and U.S. Air Force Col. Art Primas, the Pacific Air Forces International Affairs division chief, speak during a mid-level officer exchange at Joint Base Pearl Harbor-Hickam, Hawaii, Oct. 18, 2016. The PLA delegation visited PACAF as part of an annual exchange tour that included a stop at U.S. Pacific Command. (U.S. Air Force photo/Staff Sgt. Alexander Martinez)