![A man breathes through an oxygen mask at a medical center in Douma, Eastern Ghouta in Damascus, Syria January 22, 2018.](/sites/default/files/multimedia_images_2018/201802middleeast_syria_douma_chemical.jpg)
A man breathes through an oxygen mask at a medical center in Douma, Eastern Ghouta in Damascus, Syria January 22, 2018.
© 2018 Reuters
A man breathes through an oxygen mask at a medical center in Douma, Eastern Ghouta in Damascus, Syria January 22, 2018.