Now - what can happen now against Iran ?
A full scale invasion ?
Sure - especially if you consider how successful these forces against Terror today control such small countries like Iraq or Afghanistan. Where all the liberated people celebrate their liberators and where US soldiers can walk through the streets of Bagdad without the fear to be killed every minute by some suicide idiots.
So its surely no problem to control the much larger Iran with 60 millions of shi ites instead of sunnites.
And I am also sure that the iranian grand ajatollah Sistani, the leader of the iraqi shi ite majority will just sit back and watch how foreigners attack iranian shi ites . Surely this will stabilize Iraq further.
Also Iran will say to their Hezbollah and Hamas friends: "Please dont attack anyone of them around the world - they are just fighting terrorism."
Loyal countries like Germany and France cant await to join the proud allaince against Terroism and send their soldiers for this holy war.
So - there are absolutely no risks in an attack against Iran.
But even if there wouldnt be an invasion but only some nice bombing attacks there is no risk that so civilized countries like Russia or China would rebuild them in extreme short time for iranian oil dollars.
And surely the mullah regime will be destabilzed by such attacks of foreigners against Iran, because the people of Iran love it, when foreigners attack their country.
When Mad dog Saddam and his arab hordes tried to invade iran some decades ago the iranians just surrendered and didnt build a fanatic army which kicked out the iraqis from iranian territory with human-wave.attacks.
And if no invasion or bombing than surely an embargo will be effective.
Remember the iranian F-14 ? In 1980 the support with spare parts was stopped and none of these planes could fly anylonger.
So this picture

must be a paintshop fake and not one of the many still operational F-14 of the IRIAF with new camo-colours taken in a 2005 air show in Iran.
As you see - there are absolutely no risks in starting invasions/bombings/embargos against Iran.
So - what are we waiting for?