: Elena started with Passive Physical Surveillance Detection . She didn't look over her shoulder; instead, she used shop windows and car mirrors to establish a baseline of the people and vehicles around her.
Surveillance Countermeasures: A Serious Guide to Detecting ... - eBay Surveillance Countermeasures: A Serious Guide T...
In the world of high-stakes intelligence, the classic manual serves as a blueprint for those who believe they are being watched. This story illustrates the "art and science" of these tactics in action. The "Principal" and the Trap : Elena started with Passive Physical Surveillance Detection