A visit to a port of entry at America’s Mexican border reveals the difficulties in stopping the flood of fentanyl—a cheap, potent and ever more deadly drug. Javier Milei, Argentina’s president, is looking to blunt measures to escape an economic morass; our correspondent says he should instead look to Peru’s past (10:43). And remembering Robert Badinter, who killed off France’s guillotine (17:17).Get a world of insights for 50% off—subscribe to Economist Podcasts+If you’re already a subscriber to The Economist, you’ll have full access to all our shows as part of your subscription. For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account. Hosted on Acast. See acast.com/privacy for more information.