Morning Update: Visiting Ukraine’s aerial front lines

Good morning. Before the U.S. authorized use of American-supplied missiles to strike inside Russia yesterday, The Globe and Mail’s Mark MacKinnon was given exclusive access to Ukraine’s aerial front lines. In today’s edition, he takes us behind the scenes of his reporting. Plus, Toronto beat Winnipeg 41-24 to take home the Grey Cup. But first:Today’s headlines

• Iran allegedly planned to assassinate human-rights crusader Irwin Cotler
• More than half of Canadians say Trudeau should be replaced as Liberal Party leader, poll shows
• Could a saliva test detect concussions? A Waterloo biotech startup goes for that goal