Existing comment:
Piercing the Bubble:
The ninth floor of the American Embassy was designated a secure area; it contained a conference room known as the "bubble" and the CIA's code room, the Communications Programs Unit (CPU). The CPU was a marvel of concrete and steel designed to block KGB eavesdropping attempts. But in 1985, the NSA suspected security on the entire floor was compromised and decided to dismantle the CPU. No less than 20,000 tons of material had to be removed. |