 Both the MiG-21MF and the MiG-21bis were deployed almost exclusively in the fighter/bomber role.As interceptors they were somewhat unsuccessful due to their inability to detect low-flying South African aircraft.On 6 November 1981, a Mirage F1CZ achieved South Africa's first confirmed air-to-air kill since the Korean War when it destroyed Cuban Lieutenant Danacio Valdez's MiG-21MF with 30mm cannon fire.