Cargo ship Oakland crosses the Bosphorus strait towards the Marmara sea after departing from Russia's Novorossiysk port, in Istanbul, Tuesday, March 1, 2022. Turkey, which is trying to balance its support for Ukraine with its fragile economic ties to Russia, said Monday it is implementing an international convention that allows the country to shut down the straits at the entrance of the Black Sea to warships, to avoid an escalation of the conflict. (AP Photo/Francisco Seco, File)
