Why are old MiG-21s still being produced despite being 70 years old?
On June 16, 1955, the Soviet MiG-21 light supersonic frontline fighter made its maiden flight. The aircraft entered service with the Soviet Union in 1959. The famous MiG-21 was decommissioned from service with the Soviet Air Force in 1989. What's even more interesting is that outside of Russia, the MiG-21 continued not only in service but also in production.
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