Army Master Cpl. Jessome Kathrien, of the Queen's Own Rifles of Canada, instructs U.S. Army soldiers in aircraft drill refresher exercises, at March Air Reserve Base, Riverside Calif., November 18, 2016. Exercise TOPHAM is a multinational Airborne exercise hosted by the 426th Civil Affairs Battalion at March Air Reserve Base and Camp Pendleton, Calif., with field exercises on Civil Military Operations Center and Civil Information Management key collective tasks. (U.S. Army photo by Sgt. Phillip McTaggart/Released)Exercise TOPHAM is a multinational Airborne exercise hosted by the 426th Civil Affairs Battalion at March Air Reserve Base and Camp Pendleton, Calif., with field exercises on Civil Military Operations Center and Civil Information Management key collective tasks. (U.S. Army photo by Sgt. Phillip McTaggart/Released)