This is such an outrageous and arrogant attitude by the American government towards Iran. Remember that Iran was attacked on its own sovereign soil and what the American government is saying is that if Iran decides to hit back the aggressors, then American will arrive and rain bombs on Iran! Therefore, Iran has only two choices: it can do nothing and it would appear to the world that Iran did not dare to attack because it was scared of American threats. But if it decides to go ahead and attack the entity, then Iran will be giving an excuse for America to start bombing it and who knows where Iran would be then! Iran is in a very difficult situation!