The United States Used Depleted Uranium in Syria

Officials have confirmed that the U.S. military, despite vowing not to use depleted uranium weapons on the battlefield in Iraq and Syria, fired thousands of rounds of the munitions during two high-profile raids on oil trucks in Islamic State-controlled Syria in late 2015. The air assaults mark the first confirmed use of this armament since the 2003 Iraq invasion, when it was used hundreds of thousands of times, setting off outrage among local communities, which alleged that its toxic material caused cancer and birth defects.

U.S. Central Command (Centcom) spokesman Maj. Josh Jacques told Airwars and Foreign Policy that 5,265 armor-piercing 30 mm rounds containing depleted uranium (DU) were shot from Air Force A-10 fixed-wing aircraft on Nov. 16 and Nov. 22, 2015, destroying about 350 vehicles* in the country’s eastern desert.

Earlier in the campaign, both coalition and U.S. officials said the ammunition had not and would not be used in anti-Islamic State operations. In March 2015, coalition spokesman John Moore said, “U.S. and coalition aircraft have not been and will not be using depleted uranium munitions in Iraq or Syria during Operation Inherent Resolve.” Later that month, a Pentagon representative told War is Boring that A-10s deployed in the region would not have access to armor-piercing ammunition containing DU because the Islamic State didn’t possess the tanks it is designed to penetrate.

It remains unclear if the November 2015 strikes occurred near populated areas. In 2003, hundreds of thousands of rounds were shot in densely settled areas during the American invasion, leading to deep resentment and fear among Iraqi civilians and anger at the highest levels of government in Baghdad. In 2014, in a U.N. report on DU, the Iraqi government expressed “its deep concern over the harmful effects” of the material. DU weapons, it said, “constitute a danger to human beings and the environment” and urged the United Nations to conduct in-depth studies on their effects. Such studies of DU have not yet been completed, and scientists and doctors say as a result there is still very limited credible “direct epidemiological evidence” connecting DU to negative health effects.

The potential popular blowback from using DU, however, is very real. While the United States insists it has the right to use the weapon, experts call the decision to use the weapon in such quantities against targets it wasn’t designed for — such as tanks — peculiar at best.

The U.S. raids were part of “Tidal Wave II” — an operation aimed at crippling infrastructure that the Islamic State relied on to sell millions of dollars’ worth of oil. The Pentagon said the Nov. 16 attacks happened in the early morning near Al-Bukamal, a city in the governorate of Deir Ezzor near the border with Iraq, and destroyed 116 tanker trucks. Though the coalition said that the strikes occurred entirely in Syrian territory, both sides of the frontier were completely under the control of the militant group at the time. Any firing of DU in Iraqi territory would have far greater political repercussions, given the anger over its previous use there. The Nov. 16 video below shows tankers hit first by larger ordnance, before others are engulfed in sparks and ripped apart by fire from 30 mm cannons.

[youtube https://www.youtube.com/watch?v=ZQkG-RWxFfY%5D

Video of the second DU run on Nov. 22 destroyed what is described as 283 “Daesh Oil trucks” in the desert between Al-Hasakeh and Deir Ezzor — both capitals of governorates of the same names.

[youtube https://www.youtube.com/watch?v=8IC-GzY2SRw%5D

The use of DU in Syria was first reported by this author in IRIN News last October. Centcom and the U.S. Air Force at first denied it was fired, then offered differing accounts of what happened, including an admission in October that the weapon had been used. However, the dates confirmed by Centcom at that point were off by several days. It is now clear that the munitions were used in the most publicized of the Tidal Wave II attacks.

Depleted uranium is left over from the enrichment of uranium 235. It is exceptionally hard, and has been employed by militaries both to penetrate armored targets and to reinforce their potential targets like tanks against enemy fire. Though less radioactive than the original uranium, DU is toxic and is considered by the U.S. Environmental Protection Agency to be a “radiation health hazard when inside the body.”

The most likely way for such intake to occur is through the inhalation of small particles near where a weapon is used. But doctors and anti-nuclear activists alike say there hasn’t been enough research done to prove the precise health effects and exposure thresholds for humans. Most important, the lack of comprehensive research on illnesses and health outcomes in post-conflict areas where DU was used has led to a proliferation of assumptions and theories about DU’s potential to cause birth defects and cancer. Firing rounds near civilian populations has a powerful psychological effect, causing distress and severe anxiety, as the International Atomic Energy Agency noted in 2014

Internationally, DU exists in a legal gray area. It is not explicitly banned by U.N. conventions like those that restrict land mines or chemical weapons. And although the United States applies restrictions on the weapon’s handling domestically, it does not regulate its use overseas in civilian areas with nearly the same caution.

“I think this is an area of international humanitarian law that needs a lot more attention,” said Cymie Payne, a legal scholar and professor of ecology at Rutgers University who has researched DU. “As we’ve been focusing more in recent years on the post-conflict period and thinking about peace building … we need a clean environment so people can use the environment.”

Jacques, the Centcom spokesman, says the ammunition was fired that November because of a “higher probability of destruction for targets.” Shortly after both attacks, the U.S.-led coalition released the videos showing multiple vehicles lit up by bombs, missiles, and prolonged fire from the 30 mm cannons of Air Force A-10s — but did not specify that the flight crews had loaded those cannons with DU. Those videos — along with dozens of other strike recordings — have been removed from official coalition channels in recent months.

When DU rounds are loaded in A-10s, they are combined with a lesser amount of non-DU high-explosive incendiary (HEI) rounds, amounting to a “combat mix.” In November 2015, a total of 6,320 rounds of the mix were used in Syria: According to Centcom, 1,790 30 mm rounds — including 1,490 with DU — were fired on Nov. 16; on Nov. 22, 4,530 rounds of combat mix were fired containing 3,775 DU armor-piercing munitions. Though DU rounds have been fired in other theaters — including the Balkans — much of the attention centers on Iraq, where an estimated 1 million rounds were shot during the first Gulf War and the 2003 invasion.

A recent analysis of previously undisclosed firing data from the 2003 U.S. invasion of Iraq showed that most DU rounds were fired at so-called soft targets, such as vehicles or troop positions, instead of targeting the tanks and armored vehicles according to Pentagon guidelines that date back at least to a 1975 review by the U.S. Air Force. The Pentagon’s current Law of War Manual states, “Depleted uranium (DU) is used in some munitions because its density and physical properties create a particularly effective penetrating combination to defeat enemy armored vehicles, including tanks.”

The oil trucks hit in November 2015 were also unarmored and would qualify as soft targets, the researchers who performed the analysis of the 2003 targeting cache contend. The trucks, in fact, were most likely manned by civilians rather than Islamic State members, according to U.S. officials. A Pentagon representative said the United States had dropped leaflets warning of an imminent attack before the Nov. 16 strike, in an effort to minimize casualties.

“The use of DU ammunition against oil tankers seems difficult to justify militarily on the basis of the arguments used by the U.S. to support its use — that it is for destroying armored targets,” said Doug Weir, head of the International Coalition to Ban Uranium Weapons. “Tankers are clearly not armored, and the alternative non-DU HEI [high-explosive incendiary] rounds would likely have been sufficient for the task.”

The spent ammunition littering eastern Syria after the attack, along with the wreckage of the trucks, was almost surely not handled appropriately by the occupying authority — that is, the Islamic State. Even if civilians driving the trucks were not initially exposed to the toxic remnants of DU, scavengers and other local residents will likely be placed at risk for years to come.

“What will happen with the destroyed vehicles? Usually they end up in scrapyards, are stripped of valuable parts and components, and dumped,” said Wim Zwijnenburg, senior researcher at the Dutch nongovernmental organization Pax. “This puts scrap-metal workers, most likely local civilians, at risk of exposure.”

If there are few ideas for what post-Islamic State governance will resemble in eastern Syria, there are none at all about how to safely handle the depleted uranium that the U.S.-led coalition has placed into the environment.

This article was published in conjunction with Airwars.

*Correction: This sentence initially stated that the United States destroyed roughly 250 vehicles in the two raids in November 2015. It has been updated to state that about 350 vehicles were destroyed.

BRENDAN SMIALOWSKI/AFP/Getty Images