On October 16th, 1973, OPEC cut oil production by 10% and triggered an economic catastrophe that changed the world forever — and Iran is now reaching for that same weapon. The Strait of Hormuz carries 21 million barrels of oil per day, and one Iranian decision can cascade into your heating bill, your grocery prices, and the entire global economy within days. We're closer to $150-a-barrel oil than anyone in Washington wants to admit. Everything you need to understand the oil weapon and why it explains the war happening right now. New to the conflict? Start here, then subscribe for daily briefings.