The US military conducted airstrikes against Iran on Sunday to retaliate for an Iranian attack that killed two American service members in Jordan and left another missing, marking the first direct US combat deaths from Iranian fire. The strikes targeted Iran's military capabilities near the Strait of Hormuz while Iran's supreme leader warned of "unforgettable lessons," as tit-for-tat attacks spread across the Gulf region, striking civilian infrastructure including desalination plants in Kuwait and military bases in Iraq.