Reactor 2 at Japan’s Fukushima plant in full meltdown, says expert

The radioactive core of the second reactor at the Fukushima Daiichi power plant appears to have melted through the its steel casing, and is now pooling on the concrete floor below, Richard Lahey tells The Guardian.

(Lahey is former head of safety research for boiling-water nuclear reactors at General Electric, so he would probably know.)