it's necessary but it's not sufficient. once you have the electricity generator going, you have to hope that all the cables and switches up to the point where there are cooling pumps or pumping that are pumping water, that each part of that train also works. and it would not be surprising if they have -- if they encounter new problems, which hopefully would be small problems. but you're not going anywhere unless you get electricity going. this is the most important step. the third thing is how do we know which way we're going? tom laid this out right, the two possibilities here. the key one that trips the bad scenario are high levels of radiation to force the workers back like happened when we were talking the other night with sanjay and suddenly they withdraw all the workers. when are they going to do that? if there's a big radiation spike. so the thing to watch for is the level of radiation, sit increasing, decreasing or remaining the same?