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.

One key party who will not be in attendance Friday at Joint Base Elmendorf-Richardson in Anchorage, Alaska, is Ukrainian President Volodymyr Zelenskyy. Trump said Thursday during a press conference that he hopes the summit will lead to a second meeting that would include Zelenskyy.

Volodymyr Zelenskyy visited London on Thursday to shore up European support for efforts to prevent any agreement that would carve up Ukrainian land.