Pituffik is a former settlement in northern Greenland, located at the eastern end of Bylot Sound by a tombolo known as Uummannaq, near the current site of the American Thule Air Base. The former inhabitants were relocated to the present-day town of Qaanaaq. The relocation and the fallout from the 1968 Thule Air Base B-52 crash in the vicinity are a contentious issue in Greenland's relations with Denmark and the United States.