TRAVIS AIR FORCE BASE, Calif. -- A C-17 Globemaster III closes in during aerial refueling with a KC-10 Extender over the northern coast of California, Sept. 26, 2015. Both aircraft, assigned to Travis Air Force Base, Calif., took a part in the 349th Air Mobility Wing's AFSC day. The training provided the Air Force Reserve aircrews additional opportunities to hone their aerial refueling skills. (U.S. Air Force photo/Airman 1st Class Shelby R. Horn)