The Mikoyan-Gurevich MiG-21 (Russian: ?????? ? ??????? ???-21) (NATO reporting name 'Fishbed') is a supersonic jet fighter aircraft, designed and built by the Mikoyan-Gurevich Design Bureau in the Soviet Union. Some 50 countries over four continents have flown the MiG-21, and it still serves many nations a half-century after its maiden flight. The plane has the distinction of holding a number of aviation records, including 1: the most produced jet aircraft in aviation history, 2: the most produced combat aircraft since WWII, and 3: the longest production run of a combat aircraft. Its Mach 2 capability exceeds the top speed of many later modern fighter types. Estimates are that more than 10,000 MiG-21s were built. Today it is one of the greatest fighters in the world.