Finding the enemy

摘要

In the 2007 movie "The Bourne Ultimatum," the CIA's New York anti-terrorism office remotely tracks targets across Europe by monitoring radio-frequency signals emitted by cell phones. With a few taps of a computer keyboard, CIA agents identify calls made in real time, locate the phone and use it to track the caller to a specific hotel room. That scenario is now technically feasible and could play out in the real world if companies succeed in marketing the technology for homeland security, national defense and law enforcement.