Senior Airman David Holland, 28th Maintenance Squadron avionics test systems journeyman, inspects a control interface unit for foreign objects, broken wires and coolant leaks here, March 18. Members of the 28 MXS provide intermediate-level maintenance for B-1B Lancer aircraft and F-101-GE-102 engines in the 28th Bomb Wing. (U.S. Air Force photo/Senior Airman Marc I. Lane)