Why Can't This Car be Sold in the U.S.?

BBC's Nigel Cassidy asks Mike Hawes, the chief executive of the Society of Motor Manufacturers and Traders (SMMT), about the differences between cars made for the U.S. market and one on sale at a car showroom in the UK. It's a peek into vehicle standards governing everything on a car from the design of major components to the way it is built and crash-tested and then certificated for safety.