that the experts consider unsafe for babies. the national disaster in japan looking to be the costliest in reported history. the government stems put the damage there as $309 billion. more than double the cost of hurricane katrina. our dominick dinatale streaming live. what's going on in reactor number 3 now, do we know? >> shep, the authorities have got no clue whatsoever what is causing that mysterious black smoke coming out of reactor number three. that reactor and reactor number one now a major concern, shep. that's because the con tam takenment vessels for the fuel rods have now exceeded the maximum operating temperature levels they were designed to with strand. 700 degrees is what they're at. if they are exposed they will expose the fuel rods to the atmosphere. that will cause a flood of lethal radiation the scale we haven't seen so far here. in japan on top of that we are hearing that a neutron beam that