The United States cannot defend against every terrorist threat, Defense Secretary Donald H. Rumsfeld told a Philadelphia radio audience March 16. "The only way to deal with it is to go after the terrorist in the terrorists' havens where they exist," Rumsfeld said. It is better to deal with terrorists in Afghanistan and Iraq than in the United States, he said. Rumsfeld spoke as part of Radio Day at the Pentagon. The event brought together civilian and military leaders with radio stations around the country. Rumsfeld said the United States is making great progress in the war on terror. U.S....