Okay, maybe it’s not an actual forcefield. Techeblog has a YouTube video of anti-rocket propelled grenade (RPG) technology, as developed by Israeli company RAFAEL, equipped to tanks and other armored vehicles. While the computer graphics suggest there is indeed a bubble-like forcefield around the tank, the field actually illustrates the system’s range of motion. A “‘beam’ of fragments” is fired at incoming fuel-propelled projectiles, detonating them. Rather interesting, although it’s unfortunate that it appears it’d be completely useless against shaped-charge, improvised explosive devices — the Iraqi insurgent weapon of choice.