Airman 1st Class Nathan Wylie, 31st Maintenance Squadron Aerospace Ground Equipment apprentice, tightens a bolt on a container after troubleshooting a maintenance repair problem, Jan. 31, 2017, at Aviano Air Base, Italy. The maintenance course require Airmen to find problems, troubleshoot and fix the malfunctions. (U.S. Air Force photo by Senior Airman Cary Smith)