The US military has reinstated a blockade of Iranian ports after an interim ceasefire collapsed, intensifying conflict over the Strait of Hormuz, a vital waterway for global energy supplies. President Donald Trump initially announced a 20% toll on vessels transiting the strait to fund security operations but abandoned the plan within hours, following appeals from Gulf allies who instead pledged large investments in the United States. Trump stated he preferred that arrangement because he believes no party should impose a fee on the strait. Iran has attacked commercial shipping in the area, prompting US airstrikes and retaliatory Iranian strikes on Gulf states and tankers, threatening regional stability and the world economy.