Senior Airman Jerry Mitchell uses a water pump Nov. 20, 2014, while constructing an ice bridge in Fairbanks, Alaska. The bridge must be constructed every other year to provide access to the $20 million range complex used to train pilots from around the world during Red Flag-Alaska exercises. Mitchell is a heavy equipment operator with the 354th Civil Engineer Squadron on Eielson Air Force Base, Alaska. (U.S. Air Force photo/Staff Sgt. Shawn Nickel)