Former National Security Advisor Robert O'Brien explained President-elect Donald Trump's plan to "extract the minerals and oil" from Greenland by making the territory "part of Alaska." During a Sunday interview on Fox News, host Jason Chaffetz asked O'Brien about Trump's threat to annex Greenland. "Well, the latest is Greenland is a highway from the Arctic all the way to North America to the United States," O'Brien opined.