Quote from: topia on March 04, 2012, 06:34 amTwo things:I know a guy who is an insect exterminator. He uses a specially trained german shepard to find certain pests. This doggy went to k-9 school with all the other german shepards, most of which graduated and became k-9 police officers. This dog alerts on weed - I have seen it. Its a scary and funny thing to see in action. Maybe I can run some tests on this pooch...Has anyone else seen or used granulated activated carbon? I saw one package of contraband last year that was vac sealed and packed into a bag full of activated carbon, and vac sealed again. This is used by all kinds of industry to remove odors and colors. Not sure where to get it, though.The problem is that there's an urban legend that carbon shields product from x-rays. So customers officials have been discovering sheets of carbon-like materials for some time in amateur shipments, and they've probably turned it into a red flag now.