How Russia trains its deep undercover spies
![How Russia trains its deep undercover spies](https://cdn.mos.cms.futurecdn.net/MDk4JNBYmQzvaAJFxBWpZY.jpg)
Moscow's elite 'illegal' sleeper agents pose as foreigners and live under false identities known as 'legends', often for decades
Moscow's elite 'illegal' sleeper agents pose as foreigners and live under false identities known as 'legends', often for decades