美国依仗其先进的科技、经济和军事实力，建立了从水下、陆地到太空的情报监听系统，在全世界范围内不择手段地窃取政治、军事和经济情报，为所欲为，而“空中信号情报飞行”计划被美国认为是其他监听手段不能替代的重要的一环 The United States, relying on its advanced technology, economy and military strength, has established an information monitoring system from underwater, land and space to seize political, military and economic intelligence and do whatever it wants in the world. The “Aerial Signal Intelligence Flight” The plan is considered by the United States as an important part that other surveillance methods can not replace