And why not? This is their big chance to gain a valuable Shi’ite satellite in the region. From the New York Times, :
WASHINGTON, Aug. 5 – Many of the new, more sophisticated roadside bombs used to attack American and government forces in Iraq have been designed in Iran and shipped in from there, United States military and intelligence officials said Friday, raising the prospect of increased foreign help for Iraqi insurgents.
American commanders say the deadlier bombs could become more common as insurgent bomb makers learn the techniques to make the weapons themselves in Iraq.
But just as troubling is that the spread of the new weapons seems to suggest a new and unusual area of cooperation between Iranian Shiites and Iraqi Sunnis to drive American forces out – a possibility that the commanders said they could make little sense of given the increasing violence between the sects in Iraq.
Unlike the improvised explosive devices devised from Iraq’s vast stockpiles of missiles, artillery shells and other arms, the new weapons are specially designed to destroy armored vehicles, military bomb experts say. The bombs feature shaped charges, which penetrate armor by focusing explosive power in a single direction and by firing a metal projectile embedded in the device into the target at high speed. The design is crude but effective if the vehicle’s armor plating is struck at the correct angle, the experts said.
Since they first began appearing about two months ago, some of these devices have been seized, including one large shipment that was captured last week in northeast Iraq coming from Iran. But one senior military officer said “tens” of the devices had been smuggled in and used against allied forces, killing or wounding several Americans throughout Iraq in the past several weeks.
“These are among the most sophisticated and most lethal devices we’ve seen,” said the senior officer, who spoke on condition of anonymity because of the delicate intelligence reports describing the bombs. “It’s very serious.”