NUCLEAR CRISIS: HOW IT HAPPENED / Hydrogen blasts at plant surprised experts

The Yomiuri Shimbun

Nearly three months have passed since the Great East Japan Earthquake triggered a nuclear crisis that shows little sign of ending any time soon.
This is the second installment in a series that looks into what has given rise to the unprecedented crisis, dealing a fatal blow to the myth of safety at nuclear power plants in this country.
"An explosion was heard at the Fukushima No. 1 nuclear power plant."