The DEW Line and Pinetree Line radar systems formed the backbone of continental air defense in the 1950s and 1960s. The most likely routes for Soviet aircraft attacking the United States came through Canada. In particular, the Eastern Seaboard of the United States would be approached through the Greenland-Iceland-UK gap and a line of SAGE search radars ran down the coast of Labrador and southeast to St. John's, Newfoundland. These stations were supported by RCAF CF-101 interceptors at Bagotville, Quebec and Chatham, New Brunswick, as well as USAF F-102 interceptors stationed at Ernest Harmon Air Base in Stephenville, Newfoundland. These were presumably equipped with nuclear-armed AIM-26 Nuclear Falcon missiles as this was a standard configuration on the F-102.