You would have to put good money on 1 of the US navies SSGN's being in the vacinity plus the long range platforms at deigo garcia with F-18g back up and fighter escort how many strikes would you want before Iran is no longer considered a threat. i wouldn't say too many
That might be true on paper but its not in reality.
You seem to forget that Iran in 3 times the size of Iraq, it has 2.5 times the population.
Its technological well educated and has the infrastructure to maintain them self.
Not to mention the vast resources it possesses.
On-line sources estimate that it would take roughly 300k to 400k troops to do a ground invasion, and that it roughly takes 35% of all the US air-assets.
The size of the deployment versus Iran itself, and the additional assets needed to strengthen its bases in the region and secure it would be in terms of dollars and numbers 2 times the total cost of the 1 and second Iraq war combined.
As i said before its just not that simple anymore.
I do not want to show off Iran and its capabilities because fact remains that Iran VS US would be a done deal and thats not the point.
But what most people forget is that Iran is a very proud nation and has a LONG track record dating back as being the mighty Persian empire.
There is so much more to Iran then meets the eye.
Sure a full blown campaign will eventually bring down Iran to its knees but it will NOT stop them from getting the bomb.
Lets say for a moment that they do not want the bomb and that the whole program would be truly peaceful ok? Then by attacking Iran one way or another you will give them a perfect reason to pass the threshold.
Thing is Iran is investing heavy amounts of money to secure their assets and to hide their stuff in deep and extremely well protected caves and this alone without a ground offensive would give them the opportunity to continue their program even during a air campaign.
Now the thing here is that Israel can and will strike Iran if it has enough reason to do so and they have all the tech they ever need to pull it off when ever they feel the time is right.
BUT ask your self the real question would that stop the nuclear program itself, and how much resources does Iran actually have to enrich and make the bomb stored in those mountain facilities?
If this is a small amount then a attack might work out but if this amount is bigger then there is a really really big risk.
Also keep in mind after the attack Iran will respond probably with long range missiles.
Estimates are that they have around 100/200 missiles that can hit Israel.
Now how many hits can take Israel before it collapses?
As i pointed out before Israel does have the army to do a attack, BUT they lack the endurance and resilience as a nation to cope with a large scale missile attack.
It would destroy the capital, and its economy.
My point here is Iran can take several nukes and survive while Israel cannot take 1 and it will be all over.
So here we got the dilemma would the US go into Iran either by air or ground or combined, and have the risk that the Iran regime can retaliate against Israel possible by a hidden nuke or by a nuke thats being build in those caves while both the US and Israel assumed by bombing those key installations that they have delayed/stopped the program.
Keep in mind Iran has miles and miles of cave systems build.
If i would be Iran hypothetical speaking then i would do the dirty work in those cave facilities knowing that i will be perfectly hidden from Sats and Airstrikes.
And there is nothing the US or Israel can do about that unless they go in all the way.
And here we are again, its not a clear cut case like the raid on Syria, and the Raid on Iraq and its succes, the attack itself is not a factor.
However the incredible amount of what if's thats a real factor with serious repercussions and making that call has a prize tag, and thats exactly why the Arab world does not want to see a nuclear Iran but they do not want to see a war either as in the end its not the US who pays the biggest prize but its those nations who are in striking range of Iran's conventional arsenal.
Iran knows it cannot hit the US, but it can respond to any nation in a 3k miles radius, and that on itself is one factor that should not be forgotten.