At least two supertankers made U-turns near the Strait of Hormuz following U.S. military strikes on Iran, shiptracking data shows, as more than a week of violence in the region prompts vessels to speed, pause, or alter their journeys.Washington’s decision to join Israel’s attacks on Iran has stoked fears that Iran could retaliate by closing the strait between Iran and Oman through which around 20% of global oil and gas demand flows.