Urban warfare in the Iraqi city of Fallujah back in 2004 was some of the most intense the US military experienced this century. A decade later, the city saw further fighting and bombardment during the conflict with ISIS. This week, a study published by Brown University’s Costs of War project shows that the fighting witnessed by Fallujah over the past 20 years lives on in the bones of residents today. The World’s Host Carol Hills spoke to Kali Rubaii, the lead author of the study. She said the research team detected high levels of uranium and lead in the bones of study participants.