Iran's retaliatory attacks caused at least $5 billion in damage to American military bases in the Middle East in the first six months of the conflict, the Wall Street Journal writes. According to the publication, the attacks hit 274 buildings in at least 24 sites. The Pentagon estimated the damage at at least $5 billion, but the actual amount may reach $15 billion. These costs are not included in the total cost of the US military operation against Iran, which stood at $47.1 billion by mid-October.