U.S. Air Force Airman 1st Class Dylan Nigren, 355th Logistics Readiness Squadron fire truck and refueling journeyman, utilizes a fire hose during the Comprehensive Airman Fitness Month Fire Department fitness challenge at Davis-Monthan Air Force Base, Ariz., March 31, 2016. Participants demonstrated their physical resilience through exercises such as dummy drags, tool carries and fire hydrant charging.. (U.S. Air Force photo by Airman 1st Class Mya M. Crosby/Released)