 Despite being one of the newest MiG-21 fleets in service, the Romanian MiG-21 LanceR fleet was grounded due to difficulties maintaining the aircraft, and since 1996 it has had an accident rate of over 30 per 100,000 hours.Serviceability rates below 50% are not uncommon.In May 2020, Romanian F-16s and MiG-21s took part in a Bomber Task Force mission with American B-1 and B-1B bombers over the Black Sea.