Firefighters from the 17th Civil Engineer Squadron Fire Emergency Services respond to Bldg. 533 after a simulated tornado hit Goodfellow Air Force Base, Texas, April 21, 2016. Goodfellow used the exercise to test the base first responders ability to react to a natural disaster. (U.S. Air Force photo by Airman 1st Class Randall A.S. Moose/Released)