Shiites militia leader in Iraq says Iran knows what it 's doing ; coalition help not needed . A top U.S. military leader says anything or anyone who fights ISIS is welcome . Yet the defense secretary says the United States is concerned about Iran 's involvement .
Shia militia leader in Iraq says Iran knows what it 's doing ; coalition help not needed . A top U.S. military leader says anything or anyone who fights ISIS is welcome . Yet the defense secretary says the United States is concerned about Iran 's involvement .