Fresh US strikes triggered air defences in Tehran on Wednesday after President Donald Trump warned he was "not finished" with a war with Iran that has already cost his nation $37.5 billion. After the foes' fighting over the strategic Strait of Hormuz led to the collapse of a preliminary deal, the Middle East war has expanded to include the region's other key chokepoint for global oil supplies. Critics have pointed to the cost of the war that Pentagon Chief Pete Hegseth said Tuesday had soared to $37.5 billion, defending a request for tens of billions in additional funding for the military. Two weeks after fighting resumed between the decades-old foes, Trump said Iran would need more than 20 years to recover from the damage inflicted in the Middle East war. Advertisement AdvertisementAdvertisement Advertisement- Houthi threat -Kuwait's army said Wednesday its air defences were engaging with drone attacks from Iran, the latest round of Tehran's reprisals.