Tanker traffic through the Strait of Hormuz effectively stopped on April 19 after Iran reimposed blockade restrictions, but this follows a broader closure that began February 28, 2026—not a "first time in history." The strait has been largely blocked for weeks; today's zero-transits are part of an ongoing crisis triggered by the US-Israel war on Iran and subsequent negotiations, not a new or unprecedented event. The 20% oil supply figure is accurate. The framing overstates what is actually happening: this is the continuation of an existing blockade, not a historic new development.