The countdown is on as a US-declared naval blockade of the Strait of Hormuz comes into force. With Washington warning that unauthorised vessels risk interception and capture across the Gulf of Oman and nearby waters, the world is watching closely. Which ships will be allowed through? How will Iran respond? And what could this mean for crude oil, global commodities and economic stability? We break down the latest developments, the strategic stakes, and what comes next as tensions escalate in one of the world's most critical maritime chokepoints.