Inside The Ongoing Chemical Weapons Investigation In SyriaPlay
Chemical weapons inspectors still haven't entered Douma, where the U.S., U.K. and France say the Syrian government used poison gas to kill more than 40 people on April 7. Syria and its ally Russia have repeatedly denied using chemical weapons.
Here & Now's Lisa Mullins talks with Alastair Hay, a chemical weapons specialist and professor emeritus of environmental toxicology at the University of Leeds.
This segment aired on April 18, 2018.