alt Hacker News> ... part of the reasons that Trump wants Greenland is to site ICBM detection and interceptor systems.
Nothing is stopping the US from deploying those in Greenland right now.
The only reason Trump wants Greenland is he's not all there -- Greenland looks big on the map so he's fixated on it.
> Nothing is stopping the US from deploying those in Greenland
That would require the (politically unlikely) agreement of the Danish government. See article 2 of the relevant treaty [1]:
"...establishing and/or operating such defense areas as the two Governments, on the basis of NATO defense plans, may from time to time agree to be necessary..."
> The only reason Trump wants Greenland is he's not all there -- Greenland looks big on the map so he's fixated on it.
I agree that that is part of it, but there is more to it than that.
[1] https://avalon.law.yale.edu/20th_century/den001.asp