Iran rebuffs Israel's demand for giving up nuclear programme in US talks / Israel not to allow Iran obtain nuclear weapons -- Netanyahu's office / Iran must not become a nuclear state, Israel's top diplomat insists / Russia favors Israel's accession to NPT as nuclear-free state -- MFA / Iran calls on world to scrutinize Israel's nuclear activities / Tehran does not consider Israel's threat to its nuclear facilities as serious / Israel's strike has Iran facing a stark nuclear option / No plans to develop nuclear weapons after Israel's attack, says Iranian diplomat / Iran officially notifies IAEA of Israeli threats to nuclear facilities -- Foreign Ministry / Iran warns of potential change in nuclear doctrine if Israel targets facilities