The opening of the Gordie Howe International Bridge was meant to celebrate Canada-U.S. trade, but it comes as tensions between the two countries reach a new high. The Economist's Rob Russo and The Globe and Mail's Marieke Walsh break down U.S. President Donald Trump’s latest tariff threat and what's next for the Canada-U.S. relationship.

Plus: The risks of excess sun exposure are well established. But sunlight also offers health benefits. Rowan Jacobsen argues that we should make more space for the good, without tossing out the bad. The science journalist makes his case and responds to concerns and critiques some have raised about it.