The Russian air defense system is designed so that it responds to all aircraft approaching the state's airspace, a high ranking Defense Ministry source has said. "That is perhaps its basic difference from the American system," the source said commenting on recent remarks by a senior U.S. military official. Adm. James A. Winnefeld, Jr., head of the U.S.-Canadian North American Aerospace Defense Command (NORAD), said in an interview Russia continued "to fly strategic nuclear bombers near U.S. and Canadian airspace because the Russian military is seeking to maintain the illusion of power." He said jet interceptors are not ordered to...