It may not be stylish, but the new presidential limo, set to debut on inauguration day, should be the most impenetrable vehicle on the road. Dubbed "The Beast" for its tank-like construction, the custom-built Cadillac will feature tougher material than its predecessors, CNN reports. The vehicle's doors are likely as heavy as a 757's and can lock like a bank vault if necessary. The interior will be completely sound-proof and should help the president-elect feel like he's in a cocoon. While a Cadillac may seem like a gas-guzzler, the car's expected diesel engine should help Obama maintain his green bona fides.