Afghanistan is the world's top producer of opium and the illegal drug trade has helped finance the ruling Taliban. Over the past decades, millions of Afghans have fallen into drug addiction. The Taliban now claim they want to eradicate the use of narcotics. When they were in power from 1996 to 2001, the fundamentalists had banned poppy cultivation. But the intervention of US-led troops in 2001 relaunched opium production. Today, it remains permitted and is even intensifying in a country on the brink of economic collapse. Our team on the ground reports.