President Obama has tried to reassure America's NATO allies, saying Donald Trump told him he is committed to the transatlantic alliance.
The President-elect was critical of NATO during his campaign, calling it 'obsolete'. He's also hinted that he might not defend the Baltic states against Russian aggression.
Sky's Defence Correspondent Alistair Bunkall went to the Latvian/Russian border to assess Moscow's threat to eastern Europe.
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