Russia hailed the summit as "very positive," while U.S. and European leaders urged Trump to push harder for a ceasefire.

North American Aerospace Defense Command issued a statement saying it would be enforcing Federal Aviation Administration flight restrictions over Anchorage, Alaska, "in support of the presidential summit.

In an ironic twist, President Donald Trump is set to discuss the war in Ukraine with Russian leader Vladimir Putin at a military base in Alaska that was crucial to countering the Soviet Union during the height of the Cold War and still plays a role today.