Could Israel attack Iran with nuclear weapons?

Israel's only effective attack on Iran would be with nuclear weapons.Defence Minister Barak admitted they couldn't destroy some Iranian facilities with conventional weapons.Israel must choose the danger of a nuclear Iran or a preemptive nuclear strike that would be condemned by UN

USA ready to declare Iran a nuclear power

USA tested for the first time an anti-missile system made for an Iranian attack on US soil.Iran doesn't have intercontinental missiles yet then USA predicts Iran won't be attacked by Israel this year.Western intelligence agencies predict Iran will make an atom bomb this year and nuclear missiles in 2012