Scotland has some of the worst drug abuse rates in the world and the situation is getting worse. According to a UN study out last month, only five nations out of 200 are ahead of Scotland including Afghanistan, where over 98% of Glasgow's heroin comes from. The Sunday Herald's Foreign Editor David Pratt has been investigating how Scotland's heroin addiction could in fact be funding the Taliban. David travels to the back streets of Kabul, talking to heroin addicts, dealers and traffickers. He witnesses in training and operations, Afghanistan's 'untouchables' the NIU National interdiction Unit of specially trained counter narcotic commandos trained by US DEA agents and Special forces troops. He journeys to remote Badakhshan near the Tajiksitan border, one of the main trafficking routes to Europe and on to Scotland. Back in Glasgow at the end of this heroin trail, he examines the devastating effects of the global failure to deal with the growing heroin problem at it's source and end journey. Join David Pratt on Call Kaye for the bigger story of Scotland's relationship with Heroin.