But this isn't your father's looking-glass war. In the age of the Internet and social media, international espionage has entered a whole new dimension.
In the latest edition of "The Power Vertical Podcast," I discuss the new spy games with my regular co-host, Kirill Kobrin, and special guest Mark Galeotti, a professor at New York University who is an expert on Russia's security services and author of the blog "In Moscow's Shadows."
Also on the podcast, Kirill, Mark, and I talk about Russian President Vladimir Putin's upcoming birthday celebrations.
Listen to or download the podcast above, or subscribe to The Power Vertical Podcast on iTunes.