Odds and Ends
16 8, 10:57pm
Actually, the US has an agreement with Denmark (who sort-of-but-not-quite owns Greenland) that they can have military bases there and pretty much do whatever they want indefinitely. There is one there now; Thule Air Base. Its raison d'etre is pretty much what you stated.
Fun fact: In the last couple of seasons of
Richie And Ralph Mouth join the Air Force and are stationed in Greenland. It was an easy way for the actors to leave the show without outright killing them off. (Ron Howard in particular was losing his hair and no longer looked young enough to play the character.)