what will happen if the vessels are flooded with water again. the fuel has been exposed partially several days. that could cause degradation to the core in ways that aren't understood. if you pump water again, it could cause damage and make it harder to ultimately cool. >> i know this is not over, it is not time to step back from this, but we are having a review, 90 day review of u.s. nuclear facilities, then a larger comprehensive view. then a step back to look at what's happening. do you feel this uncovered a fundamental flaw, fundamental understatement of risk in reactor design and in disaster planning? >> yes. i would say that is our sense. i think in that era of complacency after three mile island, chernobyl, regulators in the industry may have become too comfortable with the idea we're never going to see that type of accident again, and i think