White Helmets chief Raed Saleh speaks at an event during the World Economic Forum in Davos, on January 19, 2017. Ruben Sprich / Reuters
White Helmets chief Raed Saleh speaks at an event during the World Economic Forum in Davos, on January 19, 2017. Ruben Sprich / Reuters

White Helmets chief warns Eastern Ghouta worse than Aleppo