The Mikoyan-Gurevich MiG-21 (NATO reporting name: Fishbed) is a supersonic jet fighter and interceptor aircraft, designed by the Mikoyan-Gurevich Design Bureau in the Soviet Union. It first flew in 1955, and more than 50 countries have used various versions. The USSR built more than 10,000 MiG-21s before ending production in 1985. The MiG-21PF was produced from 1962 to 1964. It had an updated afterburning engine and the pitot probe relocated to the top of the nose.