This video is a bunch of crap. How many of the people making this thing have a degree in electronics?? They're going off about these radios and guess what folks....there isn't a commercial radio on the planet that would have been able to transmit and receive from the interior of those buildings. There was too much structural steel, power lines and concrete for a RF signal to leave the building.I've been a comms tech for 13 years. This vido is crap.