U.S. Air Force Senior Airman Steven Valencia, 18th Component Maintenance Squadron aerospace propulsion journeyman, cleans and inspects fan blades of a TF-34 engine July 6, 2017, at Kadena Air Base, Japan. The fan blades are used to generate approximately 85 percent of the thrust used by A-10 Thunderbolt II aircraft. (U.S. Air Force photo by Senior Airman John Linzmeier)