The NSA is revealed in this NOVA documentary to great lengths. The NSA’s headquarters consist of 10’s of thousands of mathematicians, scientist, linguists, computer scientists, and more. They listen to everything. If you feel your life is as private as a diary forget about it. They could be listening in on your most intimate phone calls, or the most embarrassing ones. They have the ultimate upper hand on any politician looking to put a leash around them.
The NSA is the most advanced intelligence agency in the world. Their main job is to break codes, hack in, then listen and collect as much data as possible. The NSA has even listened in on Russian heads of state while they were in their limousines. That was back in the 1980’s.