President Donald Trump and Russian President Vladimir Putin head to Alaska on Friday for a high-stakes summit as the U.S. seeks a ceasefire in the Russia-Ukraine war.

LONDON (AP) — Russian President Vladimir Putin on Thursday praised U.S. President Donald Trump’s efforts to end the war in Ukraine, more than three years after Moscow launched its invasion, as the two leaders prepared for a pivotal U.S.–Russia summit Friday in Alaska.

The talks on Friday in Alaska pull the Russian leader out of diplomatic isolation from the West, and Ukrainian and European leaders fear it gives him an opening to sway the American president.