Terrorism without Borders

The chief of homeland security said this week that serious threats to cyberspace are on "a par with what this country tragically experienced on 9/11". This was at a technology conference in California with some of the leading professionals. This presents a interesting problem terror without borders ? It is usually very difficult to determine the source of cyber terrorist so as a result we end up with no physical targets to attack, conspirators or the people who where carrying out the terror. So in short this obviously creates some big problems for counter terrorism so ... what do we do? Do we train Internet counter terrorism teams ?