Richard finds out how the atomic energy industry began and why we ended up going with the nuclear technology we did.
After President Eisenhower's 'Atoms for Peace' speech the race for safe, commercial nuclear energy took off on a global scale.
But did the first atomic nations develop the best and safest technologies possible - or have they left the world with a ticking bomb?
Nuclear power mapped
Use the interactive map to discover how nuclear power has spread across the globeRead more on the BBC News website
A school girl who was in the centre of Hiroshima when the atom bomb exploded tells her story.Listen to Witness