Karachi has a population of 20 million - of whom an estimated half a million - are chronic heroin addicts. Mobeen Azhar finds out how a charity is helping them and their families. Show more
Discover 11,128,835 listings and 279,766 playable programmes from the BBC
Karachi has a population of 20 million - of whom an estimated half a million - are chronic heroin addicts. Mobeen Azhar finds out how a charity is helping them and their families. Show more