Red Flag 17-3's first responders
Airman 1st Class Brian Velten, 99th Civil Engineer Squadron firefighter, descends the air traffic control stairwell during Red Flag 17-3 at Nellis Air Force Base, Nev., July 18, 2017. The team raced to the top of the tower to practice evacuation procedures during an electrical fire or medical emergency. (U.S. Air Force photo by Airman 1st Class Andrew D. Sarver/Released)

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Photo by: Airman 1st Class Andrew D. Sarver |  VIRIN: 170718-F-JV039-253.JPG