Federal agents' heavy use of tear gas is raising concern about harmful effects to protestors and neighborhoods. A toxicologist explains what it is and its health effects.

Stinging clouds of tear gas explode from beneath a car full of children, forcing them to flee into the snowy street to seek air that’s safe to breathe. A man, face painted orange with pepper spray, is ...

This story was originally reported by Barbara Rodriguez of The 19th. Meet Barbara and read more of their reporting on gender, politics and policy. From the roof of the Immigration and Customs ...

A novel lawsuit in Portland argues the chemicals are a health threat that have soaked into apartment walls, furniture and even children’s toys. By Hiroko Tabuchi Federal agents have fired so much tear ...