To the least I would say arming aircraft and missiles with nuclear weapons. Nuclear technology isn't used only for weapons you know? I may go further and say the following actions would constitute "ample provocation"
Iran is well Past what is needed for legitimate peaceful power needs.
It refuses full inspection and Turned Down the EU offer of Free Offsite Enrichment.
They've turned down all negotiation/everything that would stop them from Diverting fissionable material to a Bomb program.
Iran is Drowning in Oil and Gas. They are a poster child for NOT needing Nukes.
They have occasionally Gasoline shortages because they have a shortage or Refineries and the must import it.
Instead (!) they spend Billions on deep underground secret Nuclear installations and get cost additional billions in sanctions.
1.Iran sending soldiers into Israel
2.Iran launching air strikes or missiles (note arming missiles can be considered "defense" which Israel does as well)
3.Iran declaring war on Israel
4.Iran arming air craft, submarines, or missiles with massive amounts of nuclear weapon sufficient to over come Israel's missile defense system and level the nation.
5.Iran arms more nuclear weapons than Israel
6.Robust intelligence that could be confirmed with proof that Iran intends to carry out any of the above.
These Jokes are just short of my pointing out it would be too late.
But one point is Salient.
Iran hasn't officially declared war on Israel, but Many times, it's leaders have called for Israels END and do so Regularly.
Instead of me "telling" Israel, why don't You tell Iran.
...unless if Israel agrees to disarm all nuclear weapons. Then Iran arming any nuclear weapons would also be considered "ample provocation". They can't have nuclear weapons themselves and tell their neighbors they're the only one's that can have it.
So here's a good idea. Tell Israel to disarm it's nuclear weapons so we CAN attack Iran with just cause if they do develop nuclear weapons. Of all the current nuclear countries in the world I trust Israel the least, even then it's highly unlikely.
If you find these terms to be extreme then it's time to reflect on how bias we as a nation have been towards Israel, and wonder why the middle east is upset with our unconditional support for Israel. Yet the Israeli government keeps whining that we'r not doing enough to support them.
Huh?
Israel has had Nukes for 40 years and is a threat only to attackers.
Israel ergo, never signed the NPT.
Iran not only signed the NPT, they re-affirmed it under the post-1979 regime and must abide by it's terms.
Israel, as I said in another string just a day or two ago, is in a completely DIFFERENT geo-strategic situation.
Israel, 5 million surrounded by 300,000,000 on 500x the land mass, is the poster child, perhaps only one, for Needing Nukes.
Iran is a New Radical Islamist/Fascist state
who threatens Israel regularly and is Actively NOW/Already Waging Proxy WAR with Hamas and Hezbollah.
These posts which say "if they have then everyone can" are Simplistic Nonsense.
How anyone voted in this poll without clarifying what "without amply provocation" meant is beyond me.