In part because of the recent riots in Afghanistan, I've been thinking about the links between drugs and conflict. What are the connections that exist between drug traffickers and fighters? Which politicians and warlords are involved? What impact will changes in the trafficking have on levels of violence?

Below I ask some questions and offer one deep frustration.

For a comprehensive overview of the issues, "Bitter-Sweet Harvest: Afghanistan's New War" offers a page of links at IRINnews (from the UN Office for the Coordination of Humanitarian Affairs (OCHA)).