British Columbia gets firefighter back-up from Mexico, as the province's emergency crews work tirelessly to battle dozens of wildfires. Plus, the western U.S. is enduring another fire season for the history books, with climate change fuelling the extreme conditions . Meanwhile, new poll numbers ahead of a potential late summer federal election show the Conservative Party facing an uphill battle despite the Liberals' narrowing lead. And the Olympic Games are growing - a look at the new sporting events debuting at Tokyo 2020.