Russians are angry at the expanded presence of North Atlantic Treaty Organization (NATO) ships in the Black Sea and especially in Ukrainian ports, viewing them as a challenge to Russian power and influence there. Some in Moscow and especially in Russian-occupied Crimea are even concerned that the United States is preparing to denounce the 1936 Montreux Convention, which governs the passage of military vessels through the Turkish Straits, so that the Western naval presence in the Black Sea can be expanded still further (Tsargrad.tv, April 1).