Vigilant Check Air Force Capt. Jaamal Neal performs preflight checks at Joint Base Elmendorf-Richardson, Alaska, Oct. 20, 2016, before taking off to provide refueling capabilities to Canadian CF-18s during Vigilant Shield 2017, a training exercise in the high Arctic. Neal is a KC-135 Stratotanker co-pilot assigned to the 912th Air Refueling Squadron, March Air Force Base, Calif. Air Force photo by Tech. Sgt. Gregory Brook SHARE: Download: Full Size (1.9 MB) Credit: Tech. Sgt. Gregory Brook VIRIN: 161020-F-OH871-067C.JPG Photo Gallery