One problem. In spite of their "stone-age tribalism," the Iraqis are making the EFPs themselves. As Atrios notes:
Front page NYT story, 2/20/07:
The most lethal weapon directed against American troops in Iraq is an explosive-packed cylinder that United States intelligence asserts is being supplied by Iran.
Except, you know, not.
Bleichwehl said troops, facing scattered resistance, discovered a factory that produced "explosively formed penetrators" (EFPs), a particularly deadly type of explosive that can destroy a main battle tank and several weapons caches.