Border control is a good idea, but it can not replace actual destructure of enemy. “Fortress America” does not exist anymore, the very idea of American experiment is based on an open society. It is impossible to make USA another copy of the late Soviet Union with a lot of barbed wire along all borders, without free travel and millions foreigners making legal buisness with and in USA. While anywhere exist terrorist training camps for hundreds potential suicide bombers, America can not prevent devastating attacks, and nuclear terrorism is only a question of time. Iran is behind many of terrorist acts, it has special forces dedicated for this purpose. It is really a war, and denial of this treat will not help.