Parents often complain that their children spend too much time playing video games, but some army leaders say they should not be in such a hurry to gripe. Three-dimensional video games are proving to be an ideal tool for training soldiers. Cadets at the famous military academy at West Point, in New York, for instance, train with a tank simulation game called Steel Beasts, adapted from a commercial game of the same name. Similarly, the Marine Corps has modified the popular Doom, making the game's monsters into enemy soldiers. The army makes a highly accurate military simulation game named America's Army available for free downloading from a Web site as a recruiting tool. According to an article published by the Australian Academy of Science, "The skills learn[ed] by playing interactive computer...