> They said they were not pursuing weapon enrichment.

There is literally no other reason for Iran to enrich to 60% U235 than for weapons.

The US feels threatened by Iran's nuclear and ballistic missile programs and has the military force to stop them, probably. Diplomatic avenues bore no fruit. Military force is now being used to--hopefully--end the threat definitively.

Yes, of course we are aware of what happened to Ghaddafi. It's very en vogue to point out the game theoretical incentives to develop nuclear weapons.

But seemingly people never bring up South Africa's disarmament. And nobody ever mentions that game theory also incentivizes the US prevent their adversaries from developing nuclear weapons where possible.

Giving up or stopping development of nukes may invite attack. Refusing to stop developing them may also invite attack.