The Defense Department's inspector general revealed Monday that the United States is facing a shortfall in ammunition as a result of its costly war in Iran. In a first-of-its-kind mandatory report to Congress, the inspector said that between Feb. 28 and June 30, Operation Epic Fury (OEF) had an estimated cost of $33.4 billion, with $22.3 billion of that spent on munitions alone. "The munitions expenditure on OEF has resulted in strategic inventory shortfalls and revealed industrial base bottlenecks for munitions resupply," the report states.