olution of the 1960s, giving birth to a modern nationalist movement. The radical Front de libération du Québec (FLQ) ignited the October Crisis in 1970, and the sovereignist Parti Québécois was elected in 1976, organizing an unsuccessful referendum on sovereignty-association in 1980. Attempts to accommodate Quebec nationalism constitutionally through the Meech Lake Accord failed in 1990. This led to the formation of the Bloc Québécois in Quebec and the invigoration of the Reform Party of Canada in the West. A second referendum followed in 1995, in which sovereignty was rejected by a slimmer margin of just 50.6 to 49.4 percent. In 1997, the Supreme Court ruled that unilateral secession by a province would be unconstitutional, and the Clarity Act was passed by parliament, outlining the terms of a negotiated departure from Confederation.
In addition to the issues of Quebec sovereignty, a number of crises shook Canadian society in the late 1980s and early 1990s. These included the explosion of Air India Flight 182 in 1985, the largest mass murder in Canadian history; the École Polytechnique massacre in 1989, a university shooting targeting female students; and the Oka Crisis of 1990, the first of a number of violent confrontations between the government and Aboriginal groups. Canada also joined the Gulf War in 1990 as part of a US-led coalition force, and was active in several peacekeeping missions in the late 1990s. Canada sent troops to Afghanistan in 2001, but declined to send forces to Iraq when the US invaded in 2003. In 2009, Canada's economy suffered in the worldwide Great Recession, but has since rebounded modestly. In 2011, Canadian forces participated in the NATO-led intervention into the Libyan civil war
