Grade Severity News Today

Widespread health risks. take a look at these. these are photos of the fukushima dai-ichi nuclear power plant. taken before and after the earthquake. the damaged building is unit or reactor one. this is what it looked like after a hydrogen explosion yesterday blew off the roof. the crisis in japan has people wondering how did the nuclear power plants work? peter doocy joins with us answers. >> there are 442 nuclear reactors operating in the world right now. 55 as you said are in japan. six of th...