necessary. they need to do that if for no other reason because they must keep the plant environment safe enough for people to be able to continue to work there. >> we believe that radiation levels are extremely high. which could possibly impact the ability to take corrective measures. >> this is really important. that's the head of the nuclear regulatory commission making the announcement that preceded the u.s. government saying that we think people should evacuate a region even larger than japan had suggested. it's a short statement that he makes here. i'm just going to play it one more time for emphasis. >> we believe that radiation levels are extremely high, which could possibly impact the ability to take corrective measures. >> which could possibly impact -- which could possibly impact the ability to take corrective measures. here's how "the new york times"