[aristeides]

When I asked on another thread about intercepting such communications, somebody said they would be encrypted. But couldn't you at least monitor for mysterious encrypted communications, and do direction-finding and traffic analysis on them? Time to bring in the NSA?

[Ranger]

They could be encrypted I guess, but if its a bunch of locals or low-budget terrorists, my guess is that they'd use some sort of off the shelf CB/Walkie-Talkie and police scanner system. A good trip to Radio Shack can produce some real interesting stuff. They probably sell a Heath Kit for your do-it-yourself starter terrorist.