Mike Drolet looks at the new rules in two major Canadian cities that have made masks mandatory in indoor public spaces amid the COVID-19 pandemic, and what city may be next.

And in a Global News exclusive, Mercedes Stephenson has the latest on the armed Rideau Hall intruder, including the letter he allegedly wrote.

Eric Sorensen reports on the Keystone XL pipeline suffering yet another setback, after the U.S. Supreme Court ruled to keep in place a lower court ruling that blocked a key permit for the project.

Plus, Mike Armstrong reports on the rare comet hurtling past earth that has left stargazers starstruck.

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