The first six days of war in Iran cost U.S. taxpayers at least $11.3 billion, according to Pentagon estimates reviewed by lawmakers, and experts say the ongoing cost could increase exponentially. The military used about $5.6 billion in munitions in the first two days of the conflict, according to a person with knowledge of the estimate. The munitions cost was first reported by the Washington Post. The money spent on munitions, and the added expense of any damage done to U.S. military infrastructure by Iran's retaliatory attacks on U.S. bases, aren't factored into the Pentagon's yearly trillion-dollar budget. Given this...