Do you ever lie awake at night, just waiting in fear for the Incredible Hulk to come smashing through your door and carry you off over the horizon? Do you worry about stray bullets or hand-launched rockets coming whizzing through your bedroom door, smashing you to smithereens? Well, you could be resting a lot easier if you had the same technology that Barack Obama has protecting him in the presidential Cadillac! The doors on the new US president’s Cadillac One are armour plated, and weigh as much as the cabin door on a 757 Boeing jet does. That’s quite a lot. You couldn’t lift...