Japan Reactor Meltdown Crisis / Explosion Heard at Fukushima Plant

    UPDATE: Japan’s nuclear safety agency says an explosion has been heard at Unit 2 of the Fukushima nuclear plant.

    A Government spokesman in Japan says there are signs that the fuel rods are melting in three reactors at a nuclear plant where cooling systems were knocked out by Friday’s quake.  FOX News Radio’s Jeff Monosso has more on the Japanese nuclear reactor troubles: