One would like to think it is just sabre rattling on the part of Iran, but it's not. The US, Russians, India, Pakistan all knew what would happen if either side launched missles. Iran does not appreciate that one missle launched at Israel will mean at least a dozen coming back. One nuclear missle launched at Israel and we can all kiss our arses goodbye. There is no such thing as a limited nuclear war. Pray it doesn't come to that!
from the article: U.S. warns Iran: Meet nuclear obligations or face 'next step'