U.S. and coalition troops operate a firetruck hose to combat a simulated fire during a night burning exercise as part of Northern Strike 18 at Fort Grayling, Mich., Aug. 14, 2018. The U.S. service members are assigned to the Michigan, Ohio and Tennessee National Guards, and they worked with troops from Latvia, Estonia and Bulgaria. Northern Strike 18 is a National Guard Bureau-sponsored exercise uniting service members from many states, multiple service branches and a number of coalition countries for three weeks at the Camp Grayling Joint Maneuver Training Center and the Alpena Combat Readiness Training Center in Michigan. Air National Guard photo by Staff Sgt. Bethany Rizor