Senior Airman Edgar Diaz, 31st Maintenance Group Air Force Repair Enhancement Program technician, uses a Modular Test Repair to troubleshoot circuit card components, Feb. 25, 2016, at Aviano Air Base, Italy. Each Airman selected to fulfill this special duty position goes through an intense seven-week course where they receive Modular Test Repair, miniature and micro miniature circuit card repair training. (U.S. Air Force photo by Senior Airman Areca T. Bell/Released)