So, if the Iranians are supplying arms to fuel the insurgency in Iraq, where are the guns? Anthony Cordesman, a former Defense Department official and military expert at the Center for Strategic and International Studies in Washington says, “We are still making arguments from authority without detail and explanation. We’re making them in an America and in a world where we really don’t have anything like the credibility we’ve had in the past.” It seems the groups receiving Iranian aid are nominally US allies. So, “[s]ome U.S. officials have also suggested that Iran, a Shiite theocracy, has provided aid to the Sunni insurgents, who have led most of the attacks against U.S. forces,” but “Sunni insurgents in Diyala don’t appear to need outside suppliers. They exploit massive weapons stashes containing materiel dating back to the Iran-Iraq war, when Hussein had a major military base in the area.
There is a claim that “U.S. forces have picked up specially shaped charges used to make roadside bombs capable of penetrating advanced armor, he said, with markings that could be traced to Iran and dates that were recent.” But despite displaying evidence of other weapons finds, “U.S. officials have declined to provide documentation of seized Iranian ordnance despite repeated requests.”