Ellsworth Airmen assist in wildfire consuming Custer
Tyler Lefthand, a Region One firefighter, guides a fire line to combat the wildfire in Custer State Park, S.D., Dec. 13, 2017. The firefighters used drip torches to create a controlled burn to starve the wildfire burning through the park. (U.S. Air Force photo by Airman 1st Class Donald C. Knechtel)