柏林墙是冷战的象征，而真正的冷战在墙下，墙下有一个神秘的间谍战场。为了对付前苏联，美国中央情报局在柏林墙下修筑了一条隧道，即可能是世界上最秘密的代号为“黄金”的窃听工程。这项工程于1949年开始均思和设计，历经三位中情局长，1954年完成。1949年德国分裂为两个国 The Berlin Wall is the symbol of the Cold War, while the real Cold War is under the wall and there is a mysterious espionage battlefield under the wall. In order to deal with the former Soviet Union, the CIA built a tunnel under the Berlin wall, which may be the world’s most secret code-named “gold” eavesdropping project. The project began in 1949 with both thinking and designing, after three CIA agents, completed in 1954. In 1949 Germany split into two nations