Lance Corporal Ian Roberts (right foreground), a United States Marine Corps tactical air defense controller, works alongside Royal Canadian Air Force 42 Radar Squadron air battle managers at 4 Wing Cold Lake, Alberta, on May 31, 2017, during Exercise Maple Flag 50. - Lance Corporal Ian Roberts (right foreground), a United States Marine Corps tactical air defense controller, works alongside Royal Canadian Air Force 42 Radar Squadron air battle managers at 4 Wing Cold Lake, Alberta, on May 31, 2017, during Exercise Maple Flag 50.

COLD LAKE, AB, CANADA – Lance Cpl. Devin Persons, a crash fire rescue Marine with Marine Wing Support Squadron 473, 4th Marine Aircraft Wing, Marine Forces Reserve, mans the hose as Lance Cpl. Taylor Bivona (front) and Lance Cpl. Casey Davson (rear), crash fire rescue Marines with MWSS-473, 4th MAW, MARFORRES, run to rescue simulated casualties from a burning aircraft at Canadian Forces Base Cold Lake during exercise Maple Flag 50, June 1, 2017. Crash fire rescue is an essential aviation ground support requirement MWSS-473 provides to designated fixed-wing and rotor-wing components of an aviation combat element. (U.S. Marine Corps photo by Lance Cpl. Niles Lee/Released) - COLD LAKE, AB, CANADA – Lance Cpl. Devin Persons, a crash fire rescue Marine with Marine Wing Support Squadron 473, 4th Marine Aircraft Wing, Marine Forces Reserve, mans the hose as Lance Cpl. Taylor Bivona (front) and Lance Cpl. Casey Davson (rear), crash fire rescue Marines with MWSS-473, 4th MAW, MARFORRES, run to rescue simulated casualties from a burning aircraft at Canadian Forces Base Cold Lake during exercise Maple Flag 50, June 1, 2017. Crash fire rescue is an essential aviation ground support requirement MWSS-473 provides to designated fixed-wing and rotor-wing components of an aviation combat element. (U.S. Marine Corps photo by Lance Cpl. Niles Lee/Released)

Marines with Engineer Company, Detachment Bravo, Marine Wing Support Squadron 473, 4th Marine Aircraft Wing, Marine Forces Reserve fix perimeter fencing at Canadian Armed Forces Forward Operating Location Inuvik during their annual training May 31, 2017. The Marines completed engineering projects at FOL Inuvik to increase force protection measures at FOL Inuvik during their two-week annual training period, May 26 to June 9, 2017. - Marines with Engineer Company, Detachment Bravo, Marine Wing Support Squadron 473, 4th Marine Aircraft Wing, Marine Forces Reserve fix perimeter fencing at Canadian Armed Forces Forward Operating Location Inuvik during their annual training May 31, 2017. The Marines completed engineering projects at FOL Inuvik to increase force protection measures at FOL Inuvik during their two-week annual training period, May 26 to June 9, 2017.

COLD LAKE, AB, CANADA – U.S. Navy Lt. Cmdr. Christian Basque, a navy doctor with Marine Wing Support Squadron 472, Marine Aircraft Group 49, 4th Marine Aircraft Wing, Marine Forces Reserve, shows pictures of X-rays from his civilian job as a sports medicine physician to Canadian medical technicians during exercise Maple Flag 50 at Canadian Forces Base Cold Lake, Alberta, June 2, 2017. Maple Flag is an annual multi-national training exercise hosted by the Royal Canadian Air Force with foreign nations training together to complete simulated combat missions. (U.S. Marine Corps photo by Lance Cpl. Niles Lee/Released) - COLD LAKE, AB, CANADA – U.S. Navy Lt. Cmdr. Christian Basque, a navy doctor with Marine Wing Support Squadron 472, Marine Aircraft Group 49, 4th Marine Aircraft Wing, Marine Forces Reserve, shows pictures of X-rays from his civilian job as a sports medicine physician to Canadian medical technicians during exercise Maple Flag 50 at Canadian Forces Base Cold Lake, Alberta, June 2, 2017. Maple Flag is an annual multi-national training exercise hosted by the Royal Canadian Air Force with foreign nations training together to complete simulated combat missions. (U.S. Marine Corps photo by Lance Cpl. Niles Lee/Released)

Lance Cpl. Xander Gonzalez a data Marine with Marine Wing Support Squadron 473, Marine Aircraft Group 41, 4th Marine Air Wing, Marine Forces Reserve, types code into his computer at Canadian Forces Base Cold Lake during exercise Maple Flag 50, June 2, 2017. When not training at his monthly drill or annual training, Gonzales works as an elementary school computer technician, applying his military occupational specialty to his civilian job. (U.S. Marine Corps photo by Lance Cpl. Niles Lee/Released) - Lance Cpl. Xander Gonzalez a data Marine with Marine Wing Support Squadron 473, Marine Aircraft Group 41, 4th Marine Air Wing, Marine Forces Reserve, types code into his computer at Canadian Forces Base Cold Lake during exercise Maple Flag 50, June 2, 2017. When not training at his monthly drill or annual training, Gonzales works as an elementary school computer technician, applying his military occupational specialty to his civilian job. (U.S. Marine Corps photo by Lance Cpl. Niles Lee/Released)

Warrant Officer Regenald McDonald, a Royal Canadian Air Force construction engineer with 4 Construction Engineering Squadron, speaks to Marines with Engineer Company, Detachment Bravo, Marine Wing Support Squadron 473, 4th Marine Aircraft Wing, Marine Forces Reserve, about engineering obstacles, May 28, 2017. Marines cleared an abatis created by Canadian Armed Forces members as part of exercise Maple Flag 50. - Warrant Officer Regenald McDonald, a Royal Canadian Air Force construction engineer with 4 Construction Engineering Squadron, speaks to Marines with Engineer Company, Detachment Bravo, Marine Wing Support Squadron 473, 4th Marine Aircraft Wing, Marine Forces Reserve, about engineering obstacles, May 28, 2017. Marines cleared an abatis created by Canadian Armed Forces members as part of exercise Maple Flag 50.