How will Iran seriously fight back if attacked?

Well, chances are the Iran has at least 1 working nuke or will have one fairly soon. Unlike Saddam, we have not forced Iran to disarm and the UN weapons inspectors that have gone to Iran have not come back with very reuring reports. Iran does have missiles capable of striking Israel and parts of Europe. Also, Iran is a close trading partner with Russia, so if we were to attack Iran, we would have to worry about more than just Iran's ability to retaliate. It would be very dangerous to under-estimate Iran, which is why a President McCain would have me worried.