To address concerns voiced by Trump that Denmark could not defend Greenland in the face of Russian or Chinese confrontation, Frederiksen says it would be a priority for Denmark to step up its defense role in the Arctic in partnership with other NATO countries as well as to do more on Europe's eastern frontier.

French President Emmanuel Macron touched down in Greenland on Sunday, for an official visit designed to bolster European support for the Danish territory, which is still batting away advances from the Trump administration.

As Trump vows to "get Greenland," direct flights from the U.S. are starting − on his birthday. Who will visit? What kind of reception will they get?

This move comes as President Donald Trump seeks to take control of the kingdom's semi-autonomous territory of Greenland.

While Denmark boldly extends working years to 70, America grapples with Social Security's funding crisis. The Nordic country's move highlights the tough choices facing American policymakers.