Ever wondered why you can buy fresh Peruvian blueberries in the dead of winter? The answer, surprisingly, is tied to cocaine. Today on the show, we look at how the War on Drugs led to an American trade policy and a foreign aid initiative that won us blueberries all year round.

And for more on trade and tariffs check out Planet Money's homepage. We've got articles looking at how much the new tariffs will raise prices and shows on everything from diamonds to potatoes to why you bought your couch.

This episode was produced by Sylvie Douglis with help from Willa Rubin. It was edited by Marianne McCune and engineered by Jimmy Keeley. It was fact-checked by Sierra Juarez. Alex Goldmark is our executive producer.

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Music: Source Audio: "Martini Shaker," "You the Man," and "Leisure Girls."

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