Japan struggles with nuclear reactors in wake of quake

The Fukushima No. 1 power plant of Tokyo Electric Power Co.By the CNN Wire StaffMarch 12, 2011Tokyo (CNN) -- Crews at a nuclear plant struck by an earthquake, then a tsunami and then an explosion in the span of 36 hours resorted Saturday to flooding a feverish nuclear reactor with sea water in hopes of preventing a meltdown of its core.Fukushima Daiichi plantAn explosion that sent white smoke