Barack Obama has become the first sitting US president to touch down in the Arctic - and promised to save remote communities from the ravages of climate change.
He flew into the town of Kotzebue, a community of 3,000 people which is battling coastal erosion caused by melting ice and rising sea levels.
The President's three-day visit to the wild and remote northwestern state is aimed at raising awareness of the urgent need for action on climate change.
The final day of the tour saw him meet Alaskans who say their subsistence way of life is under threat.
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