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 250 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.
See more: http://foreignpolicy.com/2017/02/14/the-united-states-used-depleted-uranium-in-syria/