The U.S. Navy has ordered 23 of the new U.S. LJDAM (Laser Joint Direct Attack Munitions) for evaluation. This is the GPS JDAM system, with the more accurate laser guidance in addition to GPS. It's economical because the only difference between JDAM and LJDAM is the additional laser seeker. The navy expects the LJDAM to pass all its tests, and plans to order 11,000 of them, starting next year. The only problem with LJDAM is that laser light can be blocked by rain or sand storms. However, laser guidance is more accurate (hitting within a meter or two of the...