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There's been controversy about high tech security devices at 26 Federal Plaza which go unused, or, like the $30,000.00 x-ray machine, get used as coffee holders. My favorite device is decidedly low-tech. It's a convex mirror with wheels on the back, attached to a pole with a flashlight on it, and used to check the underside of vehicles. The only thing lower-tech is the sniffing dog, but we have yet to build a device with that level of sensitivity to odors. Maybe we should use owls for night vision.