Heroin is one of the most addictive drugs on earth. Stronger, purer and easier to get than ever before, heroin is attracting a whole new breed of addict. Dangerously pure, the newest forms of heroin can be snorted or smoked, rather than injected, attracting millions of new mainstream users.
Inside: Afghan Heroine investigate how the war in Afghanistan has inadvertently unleashed a deluge of heroin, enticing users from Kabul to Europe to America's heartland.
The opium flower: where heroin starts its journey.