410th Maintenance Wing Headquarters Bldg., Air Force City, Clark Air Base, Pampanga July 4, 2017 President Rodrigo Roa Duterte received Mr. Sung-Yong Ha, President and Chief Executive Officer (CEO) of the Korean Aerospace Industries (KAI), Ltd. and other KAI representatives in a courtesy call at the 410th Maintenance Wing Headquarters in Air Force City, Clark continue reading : Courtesy Call of Mr. Sung-Yong Ha, President and CEO of the Korean Aerospace Industries, Ltd.