God forbid... Let's fast forward two years. Iraq is stabile. Afghanistan is stabile. We're still in both countries, though. Both nations have held elections. Osama bin Laden was caught and put to death. Saddam Hussein was put on trial and put to death. Al-Qaeda's leaders have been caught and killed, and its structure has fallen apart... al-Qaeda as a network will be done pretty much within a few years from now. Boom. April 4th, 2006, a nuclear suitcase bomb goes off in Times Square and destroys half of Midtown Manhattan, killing 250,000 people. One terrorist with one suitcase did it. How we respond? If we find out it was a terrorist group, such as Hezbollah, of course we attatck Hezbollah where they are. But, the government that supports them... Syria... do we nuke them in return? Do we nuke state sponsors of terrorism? What if North Korea passed off a nuke to a terrorist and that terrorist did it? Do we nuke North Korea, even if we aren't 100% certain they sponsored the attack? Terrorist regimes are hard to deal with. They can cause damage without leaving their fingerprints on an attack. What if a Pakistani intelligence official let terrorists into their nuclear sites, to take a nuke... do we remove the Pakistani regime, even if it had been a friend against al-Qaeda? How can we nuke individuals in return? The days of "Soviet Union nukes NY, US nukes Moscow" are over. It isn't black and white anymore.