for more, we're joined by rasha qandeel. this is a powerful documentary.agon may be a new word for people outside of the region. it has been described as the poor man's cocaine. can you tell us about it and how it became to be so prevalent for the reduction in syria, but especially its use in saudi arabia? >> thank you very much for having me. this is a project, investigation . the lead reporter on this, we've been following in six countries per year and half the network that has been using witnesses, unseen evidence, was have conversations, inside testimonies, a lot of leads. it is called that because it is not. new but it is new as a substance . originally, amphetamine-like substance and developed by germany in the first and second world war. the formula now is very different. only carries the name captagon. you've come to the conclusion after year and a half of work in six countries there are direct links between members of the assad family -- very important project -- amy: we are talking to rasha qandeel, presenter would bbc arabic. talking about this