How have drugs been used in warfare? Why does the cocaine in London nightclubs pass through a dictatorship in West Africa?Why did British soldiers get high on hallucinogens and try to talk to birds? How does heroin bought in the West create a market for child brides? And, should we legalize some drugs?  ---- Power Corrupts is written and narrated by Brian Klaas. The executive producer and sound editor is George McDonagh.