this july 4th as if it were going to pass. did you get all that? the hemp flag, flying over the capitol. hemp could not be more american, thomas jefferson, george washington, grew hemp, used for clothes, shirts, all kinds of things. 90% of our hemp from canada. the hemp flag is flying this fourth of july. >> all right. good to know, john. >> yeah. makes me laugh. moving on to something called wi-vv, it is a a low power wi-fi signal that can be used to track humans behind walls. they use two different types of waves. you can tell the wave thingies. and they're able to detect people moving around. it has to have movement. the applications are fantastic. it can be used to search for survivors trapped in rubble from an earthquake, police entering a building. who is moving around inside. the person they're tracking doesn't have to be wearing