Remains of toxic bullets litter Iraq

The normal public dose limit in the US, and recognized around much of the world, is 100 millirems per year. Nuclear workers have guidelines 20 to 30 times as high as that.

The depleted-uranium bullets are made of low-level radioactive nuclear-waste material, left over from the making of nuclear fuel and weapons. It is 1.7 times as dense as lead, and burns its way easily through armor. But it is controversial because it leaves a trail of contamination that has half-life of 4.5 billion years - the age of our solar system.

In the first Gulf War, US forces used 320 tons of DU, 80 percent of it fired by A-10 aircraft. Some estimates suggest 1,000 tons or more of DU was used in the current war. But the Pentagon disclosure Wednesday that about 75 tons of A-10 DU bullets were used points to a smaller overall DU tonnage in Iraq this time.

US military guidelines developed after the first Gulf War - which have since been considerably eased - required any soldier coming within 50 yards of a tank struck with DU to wear a gas mask and full protective suit. Today, soldiers say they have been told to steer clear of any DU.

"If a [tank] was taken out by depleted uranium, there may be oxide that you don't want to inhale. We want to minimize any exposure, at least to the lowest level possible," Dr. Michael Kilpatrick, a top Pentagon health official told journalists on March 14, just days before the war began. "If somebody needs to go into a tank that's been hit with depleted uranium, a dust mask, a handkerchief is adequate to protect them - washing their hands afterwards."

Not everyone on the battlefield may be as well versed in handling DU, Dr. Kilpatrick said, noting that his greater concern is DU's chemical toxicity, not its radioactivity: "What we worry about like lead in paint in housing areas - children picking it up and eating it or licking it - getting it on their hands and ingesting it."

In the US, stringent NRC rules govern any handling of DU, which can legally only be disposed of in low-level radioactive waste dumps. The US military holds more than a dozen NRC licenses to work with it.

In Iraq, DU was not just fired at armored targets.

Video footage from the last days of the war shows an A-10 aircraft - a plane purpose-built around a 30-mm Gatling gun - strafing the Iraqi Ministry of Planning in downtown Baghdad.

A visit to site yields dozens of spent radioactive DU rounds, and distinctive aluminum casings with two white bands, that drilled into the tile and concrete rear of the building. DU residue at impact clicked on the Geiger counter at a relatively low level, just 12 times background radiation levels.

But the finger-sized bullets themselves - littering the ground where looters and former staff are often walking - were the "hottest" items the Monitor measured in Iraq, at nearly 1,900 times background levels.

The site is just 300 yards from where American troops guard the main entrance of the Republican Palace, home to the US and British officials tasked with rebuilding Iraq.

"Radioactive? Oh, really?" asks a former director general of the ministry, when he returned in a jacket and tie for a visit last week, and heard the contamination levels register in bursts on the Geiger counter.

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