The Yugoslav Air Force had nine squadrons of 130 Soviet-made MiG-21 interceptors for air defence. In some instances SAC bombers would oppose ADC fighter-interceptors simulating Soviet interceptors. The Libyan Air Force responded by deploying a high number of interceptors and fighter-bombers. It will be carried by the modernized MiG-31BM interceptors and Su-35S and Su-57 multirole fighters. This led to intense debates about the "cost-exchange ratio" between interceptors and warheads. Waste from passive grease traps and gravity interceptors is called brown grease. That implies that dozens of interceptors are needed for every ICBM. This system can handle multiple targets simultaneously with multiple interceptors. OPD deploys black and white patrol vehicles, primarily the Ford Crown Victoria Police Interceptors. Few aircraft can be considered "dedicated" daytime interceptors. It said two interceptors are usually fired at each rocket. Like many aircraft designed as interceptors, the MiG-21 had a short range. Twin Mustangs and F-94 Starfire jet interceptors. The 157th was one of three selected ANG units to receive the Starfighter Mach-2 interceptors. Super Sabres were repainted as the Soviet interceptors.