MiG-29 jet fighters of the Strizhi (Swifts) and Su-30 jet fighters of the Russkiye Vityazi (Russian Knights) aerobatic teams perform during a rehearsal for an air show, part of the Russian all-army competition Aviadarts-2019, with the Monument to Soldier and Sailor seen in the foreground, in the Black Sea port of Sevastopol, Crimea June 7, 2019. Photo: Reuters