There are an estimated 10,000 spies in Washington DC

When i was younger i read a book titled "Spy vs. Spy" The CIA vs. The KGB. it was very good, and what made it even better is that it was based on real events. I also remember seeing some of the Diplomatic license plates from other countries that were mentioned in the book. Seeing them in person and seeing what country they belonged to. It also talked the counter espionage squads from the FBI vs. the KGB spies and their handlers. I guess now days this has become 10 fold in the espionage business. So much for not trusting anyone.