U.S. Air Force Airman 1st Class Locke Williams, 44th Aircraft Maintenance Unit crew chief, takes a screw driver out of a tool box April 19, 2017, at Kadena Air Base, Japan. When performing maintenance on aircraft such as the F-15 Eagle, proper placement of tools is necessary for fast retrieval and use. (U.S. Air Force photo by Senior Airman Lynette M. Rolen)