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I'm not saying this was a false flag event, but I don't always believe what our government and media tells us. Both have lied to us in the past. I know I'm asking a lot, but hopefully the truth comes out. My heart goes out to the victims and their families.
Drug and bomb dogs have to get pretty close to the actual source to detect the substance.
This is just a guess, but their are many types of explosives and each would have a different smell, the dog would have to be trained to detect each specific type of explosives.
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