safety agency has been saying. they are working on two assumptions. one is that in one of the reactors there is a high possibility of a meltdown. the other assumption is of another possibility, a lower possibility of a meltdown in the third reactor. two reactors affected there. what are they doing about it? they are pumping more sea water into them to try and get the water level up to cool the reactor. so far, that hasn't been working. but at the same time, radiation is being detected in the atmosphere. the government says not to a degree that's going to harm people. but they had clear the people out, as you mentioned, 200,000 people have been pushed out of that area, evacuated from their homes. 20 kilometer, 12 or 13-mile explosion zone. all of this to avert that other word, catastrophe. they hope all of the fail-safe