Iran is one of our major oil sources in the world.  If we lose trade with Iran we will have to find some other place to drill oil.  Iran is believed to have Weapons of Mass Destruction.  The U.S. is not entirely sure though.  The U.S. isn't entirely sure if Iran is still our allies or if they are our enemy. The population is 65 million(65,000,000).  The capital is Tehran.  Their religion is Muslim.