Arguments abound over whether it was a good idea to build nuclear power plants in a seismic area, over the scale of the disaster at the Fukushima complex, and over the viability of atomic energy in the West.
From Vienna - Nuclear physicist Robert KELLEY, formerly of US Department of Energy Radiological Response Programs.
From Bridgewater, England - anti-nuclear activist Nikki CLARKE of Stop Hinkley 3
Bruno COMBY, President of Environmentalists for Nuclear Energy
Economics professor Patrice GEOFFRON of the Geopolitics Center for Energy and Raw Materials
Produced by Perrine Desplats, Bilal Tarabey, Anelise Borges, Louise McWatt