https://cdnph.upi.com/ph/st/th/1431784677294/2026/upi/42db222c264925205c1d72af3c653518/v1.5/Iran-war-has-cost-375-billion-so-far-Hegseth-says.jpg" /> U.S. Secretary of Defense Pete Hegseth told a Senate committee Tuesday that the financial cost of the Iran war has now reached about $37.5 billion.