One thing's for sure, Richard Hammond has a sense of humour... Here the Top Gear host crosses the USA to learn how to drive some of the biggest and most deadly machines on the planet. He travels to Fort Bliss in El Paso to learn how to be commander, gunner and driver of a 68-ton Abrams M1A2 tank in a three-day crash course, and discovers if he has what it takes to join the crew.