World War I soldiers used urine-soaked rags to survive chlorine gas, a desperate fix that sparked early chemical warfare ...

As lethal chlorine clouds rolled across European trenches in 1915, frontline infantrymen battled advanced asphyxiation ...

ISIS is allegedly attacking Iraqi soldiers with roadside bombs containing chemical weapons, Iraq officials said Thursday.

Two cylinders that were dropped on the rebel-held Syrian city of Saraqeb in February — sending nearly a dozen people to seek medical help for nausea and other symptoms — had contained chlorine, ...