after the present war in Irac the reasons iran has become a country conflict for the United States under several:

1. Iran is a islamica republic whose governors are not controlled by the U.S.A.
2. Iran has petroleum i therefore it is a tempting country for the great multinationals.
3. the present conflict is because they iran wants to use the atomic energy to develop his cities but the U.S.A. accuses to want to him to use it for a atomica pump.