“9·11”恐怖袭击事件后,美国首脑指挥防护工程体系首次全面启用,关键时刻担负了保卫总统、副总统及政府要员的重任,并通过工程体系内部的先进指挥控制设备、设施,有效实施了一系列的重大决策和全球战略指挥控制。美国首脑指挥防护工程体系主要由夏延山地下指挥中心,美国国家预备军事指挥中心——韦瑟山 After the 9/11 terrorist attacks, the U.S. head of state directed the protection engineering system for the first time and fully implemented it. At the crucial moment, it assumed the important task of defending the president, vice presidents and government officials. Through the advanced command and control equipment and facilities within the engineering system, Effective implementation of a series of major decisions and global strategic command and control. The U.S. head command and protection engineering system is mainly composed of the Cheyenne Mountain Underground Command Center, the U.S. National Preparatory Military Command Center - Wether Hill