Trump, Frederiksen, Nielsen Sign US-Denmark-Greenland Arctic Security Deal at UNGA

President Trump, Danish Prime Minister Mette Frederiksen and Greenlandic Prime Minister Jens-Frederik Nielsen formally signed the Arctic security agreement on the sidelines of the UN General Assembly in New York on September 22, 2026, ending the roughly two-year standoff that began with Trump's threats to acquire Greenland by force. The deal lets the US expand Pituffik Space Base, the northernmost American installation and an early-warning site for incoming missiles, and establish new 'defense areas' at Narsarsuaq in the south and Mestersvig in the east; it also permits a US 'Golden Dome' ballistic-missile-defense system on Greenlandic territory, gives American aircraft rights to fly over and land anywhere on the island, grants undersea access, and bars non-NATO countries — explicitly China and Russia — from military installations or sensitive investments there. Trump called it 'tremendous for Europe and for the United States and for everybody,' Frederiksen called it 'a deal that can last forever,' and Nielsen called it 'a win-win-win,' saying 'your security is our security, and our security is your security.' NATO and the EU both welcomed the signing as strengthening Arctic and transatlantic security while preserving Greenlandic sovereignty. The agreement has no expiration date and remains binding even if Greenland becomes independent from Denmark.