Donald Trump and Vladimir Putin hold talks in Alaska on Friday, with the U.S. president's hopes of sealing a ceasefire agreement on Ukraine uncertain but with a last gasp offer from Putin of a possible nuclear deal that could help both men save face.

Trump is set to meet with Putin at Friday’s Alaska summit, with the world watching for a possible breakthrough to end the Ukraine war.

Days before the leaders of Russia and the U.S. hold a summit meeting in Alaska, Moscow's forces breached Ukrainian lines in a series of infiltrations this week in the country's industrial heartland of Donetsk.