The agreement would allow the US to expand its military presence, while Denmark and Greenland say it preserves their sovereignty and right to self-determinationDonald Trump announced on Friday that the US had struck an Arctic security pact with the leaders of Denmark and Greenland, after threatening for much of his second term to annex the semi-autonomous Danish territory by force.The full scope of the deal Trump described as “very important, historic, and special” was not immediately clear.