一、背景现有防御恐怖主义袭击政府和私营机构建筑的措施,首先重点在于预防,其次是改造建筑物。采用这种途径的主要原因是考虑时间因素。一个建筑物内部以及安全策略进行一些轻微的改动,要比完全更换一个新的建筑结构更加容易而且成本更小,并且这种改动可以立即进行。基于这些措施的现有建筑所要抵御的威胁,被集中在外部威胁,因此更加强调物理安全和边界防御 I. BACKGROUND The existing measures to prevent terrorist attacks on the buildings of government and private organizations focus primarily on prevention and secondly on the renovation of buildings. The main reason for adopting this approach is to consider the time factor. Minor modifications to a building’s interior and security policy are easier and less costly than a complete replacement of a new building structure, and such changes can be made immediately. The threats to be resisted by existing buildings based on these measures are concentrated on external threats, thus placing greater emphasis on physical security and border defense