Nuclear bomb on Isfahan

See this scary simulation (by the Union of Concerned Scientists) on what may happen if the U.S. dropped a bunker buster nuclear bomb on Isfahan. It claims up to 3 million people could die from explosion and radiation effects. Turn up the sound to hear the commentary.

http://www.ucsusa.org/global_security/nuclear_weapons/nuclear-bunker-buster-rnep-animation.html

And here is a picture of Isfahan's historic city centre: