Pituffik was a former Inuit settlement at the current site of Thule Air Base. A major radar system was also built here in the 1970s. Thule US forces township and base proper are an unincorporated enclave within Qaasuitsup municipality in northern Greenland. The permanent population of the base was 235 as of 1 January 2005. It was also the site of the 1960s 1968 Thule Air Base B-52 crash.