Pentagon estimates the U.S. cost of the Iran war has reached nearly $29 billion amid rising scrutiny and political tensions.

Pentagon estimates the U.S. cost of the Iran war has reached nearly $29 billion amid rising scrutiny and political tensions.

The United States' war in Iran has ​cost $29 billion so far, a senior Pentagon official said on Tuesday, an increase ‌of $4 billion from an estimate provided late last month.