Care packages of candy bars and beef jerky are a welcome taste of home to soldiers in Iraq, but an inventor has something they could really use: a way to make them invisible to the eyes of the enemy. Ray M. Alden has designed a system of tiny lenses and mirrors he says could be used to camouflage almost any object - a tank, a Humvee or an individual soldier - in any environment.With such a device,fighting forces would have less to fear from the urban combat they still face in the treacherous alleys of Iraqi cities, where they are...