In a statement issued Sunday, Trudeau also called on Canadians to honour the bravery of first responders during the attack.
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He also honoured Warrant Officer Patrice Vincent, who was killed two days earlier that year in a terrorist attack in Saint-Jean-sur-Richelieu, Quebec.
The Prime Minister said he thanked Canadian men and women in uniform at large for putting their lives in harm’s way to defend the country.
He added that Canada emerged stronger than ever in the wake of the attack.