All the Tech We've Used to Intercept Every Kind Of Communication

Spy cameras are probably the most axiomatic gadgets when we talk about intelligence-gathering techniques. But intercepting and decoding messages is just as important as taking pictures. Here's a look at all the devices spies have used to tap into voice, mail, phone, radio, morse, electronic messages, and other signals. »2/13/15 3:00pm2/13/15 3:00pm