New threat to troops

Extremists fire deadly rocket mortars at U.S. forces around Baghdad

Richard Tomkins
Thursday, August 28, 2008

BAGHDAD | A deadly new weapon that is beginning to show up on the streets of Iraq, the improvised rocket-assisted mortar, or IRAM, may be technologically crude and inaccurate in its aim, but its potential for death and destruction is so great that soldiers on combat operations around Baghdad conduct daily patrols to disrupt any attempt to plant the devices.

"Its mobile, it´s concealable. Those two things make it very dangerous," said Lt. Col. John Digiambattista, operations officer for the 3rd Brigade Combat Team, 4th Infantry Division.

"In the right place, at the right time, it can be very lethal," Col. Digiambattista said. "Our biggest challenge is to keep it out of an area where it can do the most damage."

IRAM thus has joined IED (improvised explosive device), VBIED (vehicle-borne improvised explosive device) and EFP (explosively formed penetrator) as the latest acronym in the arsenal for Shi'ite extremists battling U.S. forces in the Baghdad area.

In essence, the IRAM is a flying IED. It consists of a canister - a propane gas tank or cylinder - packed with explosives attached to a rocket tube (body) and powered by a 107mm rocket motor.

An IRAM can be loaded with more than 100 pounds of high explosives. In contrast, a conventional 107mm rocket carries about 3 pounds of explosives.

The device is then placed on rocket rails and fired at its target by a timing device, military officers said.

The rails typically are placed on the back of a low-sided flatbed cargo truck, an ever-present vehicle in Baghdad. The truck is parked and angled toward the target, and the devices are launched, usually four or more in succession, using delayed timers.

Aiming is directional, sort of a line-of-sight lob over the cab or a side of the truck. Distance is about 300 meters to 500 meters, more than a quarter-mile, according to Maj. Geoff Greene, executive officer of the 1st (Combined Arms) Battalion of the 68th Armored Regiment.

In June, Maj. Greene and his troops at combat operations post Callahan in the Shaab district of northeastern Baghdad narrowly escaped an IRAM attack.

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