You can't find something if it isn't there, and you can't PROVE it doesn't exist either! This was very handy for the Bush administration, because it gave Iraq no way to avoid being invaded, since you cannot prove a negative. They are attempting exactly the same gambit with Iran, and the Iranians may be naive enough to believe that having nothing to hide can actually protect them. It can't. The Bush administration doesn't care if there's nothing there to hide, anymore than they did with Saddam. It makes no difference to their policy, which is to wage unprovoked war at the time and place of their choosing...exactly what Hitler did whenever he wanted to...exactly what any of history's more infamous conquerors have done.