$25bn or $1 trillion: How much has Iran war really cost the US?

The US Defense Secretary has clashed with lawmakers over the cost of war on Iran. The Pentagon revealed that the US had spent $25 billion on the war, largely on munitions and equipment maintenance. However, Democratic leaders and economists believe this number to be a significant underestimate, with actual costs potentially amounting to between $630 billion and $1 trillion. The Pentagon has promised to provide a cost breakdown later.