Trump threatens wildfire tariff, thousands evacuated across the country, Montreal Olympics 50 years later, and more

There are now about 900 active wildfires burning across the country, with dozens more added to the tally today alone. As politicians make big promises to help, crews and volunteers are working around the clock to contain the flames.And: U.S. President Donald Trump blames Canadian forest management for smoke crossing the border, threatening devastating new tariffs.Also: Is it worth it to host international sporting events in Canada? A look at the experience of Montreal — 50 years after it hosted the Summer Olympic Games.Plus: A profile of the next UK prime minister Andy Burnham, U.S. cyclosporiasis outbreak traced to lettuce served at some U.S. Taco Bell locations, and more.