The scenario for the NATO military exercise in the Arctic circle has been similar for years now: Norway is attacked by a fictional country, triggering the alliance's collective defense clause and leading to troops from the United States and more than a dozen partners coming to the defense of the country.
But this year, the bi-annual exercise, known as Cold Response, has taken on an added significance for some of the roughly 3,000 U.S. Marines taking part in it because of Russia's invasion of Ukraine.
