During the Soviet era, the people of Semipalatinsk in Kazakhstan were used as human guinea pigs in the testing of nuclear weapons. Today they live with the consequences: sheep graze in radioactive giant bomb craters and in the most affected villages 1 in 20 children are born with birth defects. Dr Toleukhan Nurmagambetov, the boss of the city's maternity clinic, wants a genetic passport which will prevent those with suspect... see more