WASHINGTON - In September, NBC News first reported on a fierce debate within the Pentagon over an Israeli-made system that shoots rocket-propelled grenades (RPGs) out of the sky. The Army seems intent on killing the system, but officials in the Office of the Secretary of Defense believe it can save American lives. Over the last three years, U.S. commanders in Iraq have issued a series of urgent pleas for a system to counter RPGs — a favorite weapon of insurgents in Iraq and Afghanistan. The Pentagon's Office of Force Transformation (OFT) scoured the world for a solution and thought it...