Russian Ka-52 "Alligator" attack helicopters fly in formation during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)

Russian Su-25 jet fighters fly in formation during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)

Russian Tu-95MS strategic bombers fly during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)

Russian Tu-95MS strategic bombers fly during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)

Russian Su-25 jet fighters fly in formation during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)

Russian Su-25 jet fighters fly in formation during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)

Russian Mi-24 helicopters fly during a Victory Day air parade rehearsal over Moscow, Russia, on May 4, 2020. A total of 75 airplanes and helicopters took part in the Victory Day air parade rehearsal, including MiG-31K fighters capable of carrying hypersonic Kinzhal missiles, fifth-generation Su-57 fighters, A-50 long-range reconnaissance aircraft, Il-76 transport aircraft, Tu-95MS and Tu-160 strategic bombers, as well as Mi-8 and Mi-28N helicopters. (Sputnik via Xinhua)