Article: Cold War Spies – Vilyam Genrikhovich Fisher & Rino Hayhanen

The link below is to an article that looks at two cold war spies and their unveiling.

For more visit:
http://mentalfloss.com/article/32100/how-nickel-and-paperboy-brought-down-cold-war-spy

Article: The Early History of 5 US Spy Agencies

The link below is to an article that looks at the early history of five US spy agencies.

For more visit:

The Early History of 5 Spy Agencies – Mental Floss.

Article: Spy Tunnels

The link below is to an article that looks at 5 spy tunnels from around the world.

For more visit:
http://www.mentalfloss.com/blogs/archives/142471