Short of using nuclear weapons, no, the US cannot "level Iran tomorrow". And the threat of nuclear weapons has become much weaker over the decades, it would be political, and potentially national, suicide to use them at this point.
Also, sure the US can kill lots of civilians in Tehran with a nuke. But then what does China think? What about Russia? It starts a huge shit show that will not end well for anyone on this planet.
Jtsummers•1h ago