speculation there was melting on the casing outside the reactor and now we're getting this news of perhaps a meldown inside the reactor itself. you hear this world "meltdown" and it brings alarm bells. i had to put this 20 kilometer, 13-mile exclusion zone around the area, evacuating as many as 200,000 people from their homes. within the structure itself, within the nuclear power plant, there are many what they call redone dance safety features. if something fails, something else is in place to guard against potentially harmful consequences. the question is if all of those various safety valves, if all of the safety procedures, if you like, fail, what happens then? does the radioactive material go into the soil and cause even greater problem? is it released into the atmosphere? these are the areas of uncharted territory that they could be entering now. many steps before you get to