Firefighters work together to battle a blaze during a training exercise at Sheppard Air Force Base, Texas, April 17, 2019. Departments from Sheppard, Wichita Falls, Texas, and Lawton, Oklahoma, converged on the Sheppard AFB fire pit to practice different methods of combating an aircraft fire. (U.S. Air Force photo by Airman 1st Class Pedro Tenorio)