Between President Donald Trump claiming there’s a flood of fentanyl from Canada to the U.S., and people here insisting there’s almost none, the truth is elusive. A new American report gets to the bottom of what’s really going on, and its author, Jonathan Caulkins, talks to Brian about what he found. Specializing in crime systems, the professor from Carnegie Mellon University's Heinz College breaks down how global supply chains run by criminal organizations moving from Mexico to China to Australia feed Canadian labs with precursor chemicals. And how much of the final made-in-Canada product actually ends up on America’s streets — including, unexpectedly, in Alaska.

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