[1/2] Russian navy sailors attend a ceremony ahead of Victory Day, which marks the anniversary of the victory over Nazi Germany in World War Two, in Sevastopol, Crimea May 5, 2023. REUTERS/Alexey Pavlishak MOSCOW, May 12 (Reuters) - The commander of Russia's Black Sea Fleet has said its defences are being tightened amid a flurry of Ukrainian drone strikes targeting its home base, the Crimean port of Sevastopol. Vice Admiral Viktor Sokolov told Friday's edition of the military newspaper Krasnaya Zvezda ("Red Star"): "In connection with the threat of attacks by robotic surface and underwater systems, we have increased the...