A crew chief assigned to the 97th Maintenance Squadron watches a U.S. Air Force C-17 Globemaster III taxi to the flight line during a severe weather exercise, May 21, 2020, at Altus Air Force Base, Oklahoma. Having several aircraft generated at the same time allowed maintainers to test their abilities for real-world events. (U.S. Air Force photo by Airman 1st Class Breanna Klemm)