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War Technology NPR's Eric Westervelt reports if the United States attacks Iraq, the latest and most sophisticated American weapons and equipment will be on display. The Army now has Humvees that can stop a .50 caliber bullet, and the unmanned support plane in its arsenal -- in addition to other weaponry far evolved from the equipment used in the Gulf War. Researchers are still working on ways to improve communications during combat among different branches of the armed forces and between different units.