right now i want to get the latest on the nuclear crisis. cnn's stan grant is watching all of that from tokyo. stan, any change in the status of those fuel rods? >> reporter: randi, as you've been outlining, it's been an extraordinary day, new stwists and turns in this nuclear devastation. there was a hydrogen explosion as you outlined in the number three reactor, at least in the house that houses the number three reactor. didn't affect the reactor, but blew a hole in the wall and affected the cooling system in number two. that's where the focus has been. the fuel rods in the number two reactor has been dangerously exposed, saying officials can't reject the possibility of a a meltdown in that reactor. they're trying to pump seawater