An eyewitness account of the overthrow of Ghana's famous independence leader. And we examine Nkrumah's legacy with Prof. Gareth Austin from Cambridge University. Plus the story of a heroic African WW2 airman, the scientists who alerted the world to the threat of acid rain, a Nobel Peace Prize winner on the 1990s campaign to ban landmines and an inside account of Ireland's financial crisis.

Photo: Kwame Nkrumah c 1955 (Getty Images)