Ukraine’s military said on Aug. 3 that a Ukrainian missile strike the day before sunk a Russian Black Sea Fleet submarine and damaged a S-400 air defense system in Russian-occupied Crimea. In a statement on Telegram, the military said that the Ukrainian strike had “significantly damaged” four launchers of Russia’s modern S-400 Triumph air defense system. The military named the Kilo-class submarine Rostov-on-Don as the submarine that it says sunk in the port of Sevastopol. “As a result of the hit, the boat sank on the spot,” the General Staff said in the statement. The military said that the su…