In Canada, today is the 30th anniversary of The FLQ October Crisis, 30 years after Pierre Elliott Trudeau invoked the War Measures Act. Invoking this act permitted suspension of basic civil liberties. Many subversives were rounded up. This act would prove to be deeply controversial, and still divides english and french Canadians.

Trudeau's reasons for invoking the War Measures Act may be found here:
Pierre Elliott Trudeau's Speech of October 16, 1970