Night light
The lights along the flight line at Eielson Air Force Base, Alaska, shine under the Aurora Borealis, or Northern Lights March 18, 2015. Eielson is home to RED FLAG-Alaska, a series of Pacific Air Forces commander-directed field training exercises for U.S. forces, provides joint offensive counter-air, interdiction, close air support, and large force employment training in a simulated combat environment. (U.S. Air Force photo by Staff Sgt. Shawn Nickel/Released)