The day the NATO summit in Vilnius opened - July 11 - was marked in Cuba by the arrival of the Russian Navy warship Perekop of the Baltic Fleet. Canada has promised more than $1.5B in military aid to Ukraine.Ukraine to rely on security guarantees from individual G7 allies until it joins NATO.Nuclear threat from Ukraine war prompts Ottawa to update plans for catastrophe.The new threat may say more about Russia's weakness than its strength, as the strategic balance in the waters around European Russia shifts against it. That's something Russian President Vladimir Putin has been anxious to avoid, opting instead to present his war on Ukraine as a 'special military operation.' The threat to sink commercial shipping marks an escalation that can only be carried out under a state of declared war, said Tanya Grodzinski, a naval historian at the Royal Military College in Kingston, Ont. Ukrainian President Volodymyr Zelenskyy has asked Turkey to join him in a new arrangement to protect grain ships without Russia's involvement. This week, Russia unilaterally ended talks on renewing the Black Sea Grain Initiative that has allowed food to flow to other countries from Ukraine, despite the war. This obvious threat to sink commercial shipping appears to be an attempt to prevent ships from taking on Ukrainian grain.

Since midnight Wednesday, Moscow time, Russia has been warning the world that any ship approaching a Ukrainian port 'will be regarded as potential carriers of military cargo.'

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