There have been numerous reports of a massive explosion at Iran's Fordow underground nuclear enrichment facility. Needless to say, Iran is denying any such occurrence (see: http://english.farsnews.com/newstext.php?nn=9107139719).
How can we know the truth? "Let's go to the videotape!" Or at least go to the satellite photographs.
Just by chance, the tunnel entrances have disappeared. Did they vanish owing to an explosion, or were they blocked to prevent the escape of nuclear radiation?
You're the expert, and I'll let you decide! How could I possibly know.
And just by chance, Israel recently moved two Iron Dome batteries to the Haifa region, not far from Lebanon, where Iran's surrogate, Hezbollah, holds sway (see: http://www.globes.co.il/serveen/globes/docview.asp?did=1000817259&fid=1725). It had been speculated that the transfer of the units involved concern over the deteriorating situation in Syria. Go figure . . .