Canada's Cold War military doctrine and fate was inextricably tied with that of the United States. The two nations shared responsibility for continental air defence through NORAD (North American Air Defense Command) and both belonged to NATO and contributed forces in Europe. Should nuclear war with the USSR have broken out, Canada would have been in harm's way because of the geographic position between both the USSR and US. Prime Minister Brian Mulroney's 1987 "Canadian White Paper on Defence" acknowledged this reality citing that, "Soviet strategic planners must regard Canada and the United States as a single set of military targets no matter what political posture we might assume." This sums up Canada's Cold War predicament well, as Canada's geo-political relationship with the US meant that Canada would inevitably be widely devastated by any US-Soviet nuclear exchange, whether it was targeted or not. It led to a familiar phrase of the time, "incineration without representation".