US sarin gas attack left 1,400 dead in 2013 sarin gas against civilians in August 2013 uses chemical weapons deploying chemical weapons August 2013, chemical weapons were deployed deploying chemical weapons on its own civilians using gas nerve agent against civilians… gases their own people emerged escenas similares similar scenes 1,400 people chemical weapons attacks liknande slaktscener gassed his own people Washington Post weapons of mass destruction sarin gas in Ghouta cenas de massacres como essas August 2013, Washington Post weapons of mass destruction peristiwa pembantaian yang sama chemical weapons attack Washington Post Assad used chemical weapons Bashar Assad for the August 2013 attacks deploying chemical weapons on its own civilians alleged use of chemical weapons by Assad’s forces deploying chemical weapons on its own civilians reported that chemical attack Bashar al-Assad’s use of chemical weapons against his people