Even in the face of precision guided missiles, tanks have continued to dominate the battlefield. Todays battle tanks are high-technology war machines, with everything from depleted-uranium armor to computer-aimed guns. Take a look at today’s most potent main battle tanks from around the world: the sleek American M1 Abrams, the British Challenger, the French Leclerc, and the German Leopard 2. In this documentary, part of the Firepower video series that aired on the Discovery Channel, design experts talk about their newest designs for battle tanks.