ARMY: Seatbelt clasps: Seatbelt parts were made from a grade of aluminum that was inferior to that specified in DOD's requirements. The parts were found to be deficient when the seatbelts were accidentally dropped and they broke. NAVY: Routers: The Navy, as well as other DOD and government agencies, purchased counterfeit network components -- including routers -- that had high failure rates and the potential to shut down entire networks. A 2-year FBI criminal investigation led to 10 convictions and $1.7 million in restitution. AIR FORCE: Microprocessor: The Air Force needed microprocessors that were no longer produced by the original manufacturer for its F-15 flight-control computer. These microprocessors were procured from a broker and F-15 technicians noticed additional markings on the microprocessor and character spacing inconsistent with the original part. A total of four counterfeit microprocessors were found and as a result were not installed on the F-15's operational flight control computers. Global Positioning System: Oscillators used for navigation on over 4,000 Air Force and Navy systems experienced a high failure rate and failed a retest. These oscillators were provided by a supplier that Global Positioning System engineers had previously disapproved as a supply source. Air Force officials stated that while the failure would not cause a safety-of-flight issue, it could prevent some unmanned systems from returning from their missions.