U.S. Air Force (USAF) Lt. Col. Jeremiah Castillo, 36th Mobility Response Squadron USAF director of operations, discusses humanitarian assistance/disaster relief (HA/DR) training with three COPE NORTH 2018 exercise directors and Tinian civil leaders and airport officials, Feb. 13. This year's COPE NORTH is an annual Pacific Air Forces tri-lateral HA/DR exercise with participants from the USAF, U.S. Navy, U.S. Marine Corps, Koku Jieitai (Japan Air Self-Defense Force), and Royal Australian Air Force. COPE NORTH is a model opportunity for expanding engagements with the Commonwealth of the Northern Mariana Islands.(U.S. Air Force photo by Capt. James Moore)