The Trump administration announces it will withdraw from the Open Skies Treaty within six months, alleging continuous violations by Russia.
Russian cargo vessel MV "Kuzma Minin" runs aground and then is refloated off Gyllyngvase, Cornwall, and taken to anchor in Falmouth Bay for inspection, according to the Maritime and Coastguard Agency.
Russia stops three Ukrainian Navy vessels from passing under the Kerch Strait Bridge by blocking it with a cargo ship. Russia claims they violated her territorial waters and ignored warnings. The navy vessels and their crews are seized after shots were fired. Russia says three Ukrainians were wounded. According to Ukraine, six of their sailors are wounded. Ukraine denies their ships did anything wrong.
A 7.7 magnitude earthquake strikes off Russia's Kamchatka Peninsula, west of the Alaskan Aleutian Island of Attu, in the North Pacific Ocean. No immediate reports of casualties or damage; a tsunami warning was cancelled.