布朗大学：美国20年反恐战争战争成本报告（英文版）

The United States, over the last two decades, has already spent and the Biden administration has requested about $5.8 trillion in reaction to the 9/11 attacks.2 This includes the estimated direct and indirect costs of spending in the United States post-9/11 war zones, homeland security efforts for counterterrorism, and interest payments on war borrowing.