Invasion Iran

What if the US had included Iran in War on Terrorism?

Background
On September 11, 2001 the US was hit by a terrorist attack. The US began preparing for the invasion of Iraq and Afghanistan. The US also chose Iran because the US felt that Iran have something to do woth the attacks to show there not to be messed with. So in 2003, the US invaded Iraq. The battles happen the same as in OTL. The veterans are replaced by fresh recruits. The veterans began preparing for Operation Iran Freedom. The objectives were 1.) take control of Islamic government, 2.) eliminate any terrorists, and 3.) secure a democrat goverment. So on June 4, 2004, Operation Iran Freedom began.