A U.S. Air Force Reserve KC-135 Stratotanker assigned to the 507th Air Refueling Wing out of Tinker Air Force Base, Okla., takes off during Northern Edge, May 14, 2019, from Eielson Air Force Base, Alaska. Northern Edge is one in a series of U.S. Indo-Pacific Command exercises in 2019 that prepares joint forces to respond to crises in the Indo-Pacific region. (U.S. Air Force photo by Senior Airman Eric M. Fisher)