A member of the Royal Canadian Air Force takes part in the Exercise Coalition VIRTUAL FLAG 19-4 at Kirtland Air Force Base, N.M., Sept. 10, 2019. The synthetic battle spaces used numerous simulators to connect to 88 systems and 23 sites around the world, synchronizing multi-domain DoD weapon systems along with coalition partners including Canada, The United Kingdom and Australia. (U.S. Air Force photo by Staff Sgt. Kimberly Nagle)