Donald Trump and Vladimir Putin shook hands and smiled at an air base in Alaska on Friday as they opened a high-risk summit that will test the US president's promise to end the bloody war in Ukraine.

In choreographed drama, Trump and Putin each arrived in their presidential jets and walked under gray skies to greet each other on the tarmac, before walking a red carpet together to an honor guard salute.

As fighter jets circled overhead, a reporter shouted audibly to Putin, "Will you stop killing civilians?"

Neither leader answered as they posed at a podium that said "Alaska 2025" before Putin -- in a highly unusual move -- followed Trump into the US presidential limousine.

For the Russian president, the summit marks his first foray onto Western soil since he ordered the invasion of Ukra

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