Senior air defense experts from the Hawaii Air National Guard and Philippine Air Force discuss air defense development during a visit to the Philippine Air Defense Control Center, Aug. 7, 2018, Villamor Air Base, Manila, Philippines. The airmen were taking part in a subject matter expert exchange between the HIANG and PAF as part of a National Guard State Partnership Program engagement. (U.S. Air National Guard photo by Senior Airman Orlando Corpuz)