the FBI has been secretly flying over our homes right here in the valley with equipment designed to track phone calls and record video Pentagon officials are telling CBS News tonight they are monitoring a suspected Chinese spy balloon that's been flying at high altitude over the

signals intelligence or signant is a pretty big topic intercepting the signals whizzing through the air is something that is not easy and historically mostly been relegated to militaries around the world however with recent conflicts around the world proving that a quick trip to

the concept of the observation post has been a critical part of warfare since the dawn of time but as the industrial revolution brought about the horrors of modern warfare the concept of the listening post became in many cases even more important than observation in importance th