Brandon Gunn, a crew chief with Arnold Air Force Base Fire and Emergency Services, speaks with Maj. Gen. C. McCauley von Hoffman, director of Logistics, Civil Engineering, Force Protection and Nuclear Integration, Headquarters Air Force Materiel Command, about hazardous materials response during her visit to Arnold Air Force Base, Tennessee, Dec. 1, 2022. Arnold AFB is headquarters to Arnold Engineering Development Complex. (U.S. Air Force photo by Jill Pickett)