Efox, thanks for your love for the 160,000 US soldiers and 170,000 US contractors currently downwind of Natanz. Efox said "Let Iran Refine some Uranium, then Blow It Up. Let`s see some irony in action when their own refined isotopes contaminate a few thousand square kilometers." Iran already stores Uranium refined to 3-5% at Natanz. It's fallout is deadly. Now, since you don't understand the thermodynamics of a mushroom cloud, let me explain it to you. An explosion deep underground at Natanz will create a shaped explosion straight up, followed by an intense heat updraft that will draw large amounts of radioactive dust/sand high into the atmosphere. The majority of contaminates will travel in the direction of Iraq, Israel, and Turkey where they will settle out of the atmosphere. Now I know you don't care a bit about killing\contaminating innocent Arabs or Persians, but the majority of that radioactive dust/sand isn't going to stay inside Iran. There's your "Irony".
Pakistan: Suicide bomber attacks tribal police, killing 4 (Reuters)
from the article: Iran: We have 3,000 centrifuges working at enrichment plant