Border patrol agents use a drug sniffing dog to check vehicles at California's Pine Valley checkpoint, on the main route from Arizona to San Diego, Dec. 14, 2017 (AP Photo/Elliot Spagat, File)
February 3, 2025
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February 3, 2025 12:05 p.m.
Tariff threats take aim at fentanyl trafficking. Here's how the drug reaches the US
Neither Canada nor China has signaled major changes to tackle the flow of fentanyl into the U.S., and each has said it would retaliate for any U.S. tariffs.