The McDonnel Douglas F-4G Wild Weasel was a supersonic, jet-engine aircraft conceived to attack and knock out surface-to-air missile launching sites and its radars in order to blind enemy air defense systems, thus, clearing the way for the bombers to fly in and destroy their assigned targets. Developed from the F-4E Phantom II version, it entered service in 1978, being the result of the hard-won experience in Vietnam, where Soviet-made SAMs shot down hundreds of US ground-attack aircraft as well as B-52 bombers. It would be used in the 1991 Gulf War to blind the Iraqi air defense system.
In order to convert an F-4E into an F-4G Wild Weasel, the 20mm M61 Vulcan cannon was removed to make room for an APR-38(t) Radar Homing and Warning Receiver. The cockpit was also upgraded with new avionics and flight instruments. To destroy enemy radars and misiles launching sites, the Wild Weasel was armed with AGM-45 Shrike and AGM-78 Standard anti-radation missiles.
F-4G Wild Weasel in Action (footage)