U.S. forces are racing to reopen the Strait of Hormuz as Iran threatens the critical shipping lane with mines. The Navy now relies on unmanned systems after retiring minesweepers. The U.S. is racing to reopen the Strait of Hormuz as Iran threatens one of the world’s most critical shipping lanes, testing a Navy that has recently retired most of its dedicated minesweepers and is now relying on a smaller fleet of unmanned systems... [5570 chars]