Photos: Soldiers train under the northern lights

With the aurora borealis as a backdrop, paratroopers with 1st Battalion, 501st Parachute Infantry Regiment, 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division secure an area during night live-fire training at Fort Greely on Tuesday, Oct. 25, 2016, near Delta Junction. The battalion spent much of Exercise Spartan Cerberus in subzero temperatures, training in Arctic, airborne and infantry tasks. (Staff Sgt. Daniel Love / U.S. Army)