Today I was stuck in traffic behind a Memphis Fire Dept car that had a strange antenna on it. Besides the silver coiled antenna mounted on the trunk, it had a black, thick antenna mounted on the roof behind the red lights. It was about 2 to 2 1/4 feet long with a silver base. I looked for any unusual markings on the car like Battalion Chief, etc., but saw nothing that would distinguish it from other MFD cars. Anybody have any ideas what it could be for. Possibly a laptop?