A senior advisory panel to Defense Secretary Donald Rumsfeld is drawing up recommendations for how to improve defenses against the scourge of U.S. forces in Iraq -- roadside bombs. A Defense Science Board task force on improvised explosive devices (IEDs) is working to identify options for improving defenses against the Iraqi insurgents' weapon of choice -- which have killed hundreds of soldiers and maimed thousands -- as well as alternatives for suffocating the entire insurgent IED enterprise. "In this operation,...