In this Monday, April 16, 2018 photo, people gather in front of a hospital that locals referred as Point One, left, just meters away from where the alleged chemical weapons attack occurred in the town of Douma, the site of a suspected chemical weapons attack, near Damascus, Syria. The survivors blamed the attack on the Army of Islam, the powerful rebel group that controlled the town before it was taken over by Syrian government forces this week, although they did not offer evidence to back up their claims. (Hassan Ammar/AP)
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.
