AGE Flight
U.S. Air Force Airman 1st Class Jonathan Baker, 355th Equipment Maintenance Squadron aerospace ground equipment journeyman, uses a bench vise to lock a wheel in place in order to replace its inner tube at Davis-Monthan Air Force Base, Ariz., Oct. 9, 2014. Replacing the tube can be difficult because if it is not installed correctly, it can get pinched in between the steel rim and the tire, causing the tube to explode when inflated. (U.S. Air Force photo by Airman 1st Class Betty R. Chevalier/Released)