[fintstone]

Great plan. But you mis-characterize it a bit to make the Pentagon seem nefarious. It does not claim the intent to bomb cities (as Hiroshima, etc....). but that is a good way to destroy biological or chemical weapons materials at their source with a very small very hot, nuclear explosion as opposed to dispersing them into the atmosphere with conventional weapons and killing millions.
Rumsfeld made a good case...that all we have are very large dirty bombs....and that it certainly makes since to study smaller cleaner ones that can be used for precision work against a WMD target.