Aleppo, Syria, Apr. 8, 2018. Children act out a performance of the chemical massacre in Douma. A sit-in for children and civilians in the town of Sawran in Aleppo, Northern Syria, condemns the chemical massacre committed by Syrian government forces in the besieged city of Douma, Eastern Ghouta. The massacre killed and wounded hundreds of civilians. Local and international reactions have continued in recent hours, most of them condemning the massacre. The president of the United States, Donald Trump, has promised to hold President Bashar al-Assad accountable for the chemical massacre in Douma. Trump said that al-Assad is an "animal" and that he will "pay dearly."