Russian President Vladimir Putin’s final words at the Alaska summit were delivered with a smile, spoken in an uncharacteristic burst of English.

Details of the Russian president's demands have emerged following the summit in Alaska - as Ukrainian President Volodymyr Zelenskyy prepares to fly to Washington DC to see Donald Trump for the next stage of talks.

Hillary Clinton Says She Would Nominate Trump For Nobel if He Could End Russia-Ukraine War Hillary Clinton made a surprise

In particular, cutting off the “shadow fleet” of tankers that deliver Russia’s oil under the radar would send the war economy into a “deep financial crisis,” according to Robin Brooks, a senior fellow at the Brookings Institution and former chief economist at the Institute of International Finance.

Sources tell NBC News President Trump discussed U.S. and NATO-like security guarantees for Ukraine as part of a possible permanent peace deal with Russia on his way back from his summit with Russian President Putin.

First Lady Melania Trump penned a “peace letter” to Russian President Vladimir Putin, pushing for an end to Russia’s war in Ukraine and lamenting the violent conflict’s harm on the youngest generation.

US President Donald Trump is threatening tariffs on other countries that buy Russian oil, in an attempt to pressure Moscow to end the war in Ukraine. But the United States and Europe themselves are still doing billions of dollars in trade with Russia.

Vladimir Putin and Donald Trump held a joint news conference following Russia-US talks. President of Russia Vladimir Putin: Mr President, ladies and gentlemen, We held our talks in a constructive and mutually respectful atmosphere, and they have proved substantive and productive.