Cables recently released by WikiLeaks show the Japanese government was warned about the design of its nuclear reactors years ago, and did not act.

U.S. Concerned Japan Facing Situation That Could Be 'Deadly For Decades': ABC News:

"People are getting so concerned about what are at the moment pretty low levels of radiation as far as the general public is concerned.

But the real problems ... are in dealing with the earthquake and the tsunami," said Dr Richard Wakeford of Britain's University of Manchester.