Iran's military announced Saturday it has reimposed strict control over the Strait of Hormuz, a critical global shipping lane, after briefly reopening it on April 17. The move escalated the standoff with the US, which maintains a naval blockade of Iranian ports — Iran says it will keep the strait closed until the blockade ends, while the US says its blockade will continue. The back-and-forth over the past 24 hours has left global shipping uncertain whether the waterway will remain accessible, with energy prices already volatile given roughly 20% of world oil passes through the strait.