Under Secretary of the Air Force Matthew P. Donovan watches as 312th students train on vehicle entry during his tour of Goodfellow Air Force Base, Texas, Feb. 13, 2019. The 312th Training Squadron Flight Chief, Michael Dejacomo escorted Donovan around the 312th TRS fire pad where all Department of Defense firefighters train. (U.S. Air Force photo by Airman 1st Class Zachary Chapman/Released)