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Welcoming this hour, our viewers in the u.s. as around the world. well, there are also reports of more trouble at the nuclear plant in fukushima. japanese media are reporting the cooling system has stopped at one of the reactors there. let's get straight to stan grant. he is following that story from our tokyo bureau, and he joins us live now. stan? >> reporter: yeah, this continues to grow, doesn't it, andrew? this entire nuclear emergency. it seems to be one development after another. and none of them particularly good. we're hearing now about the number 2 reactor at the daiichi nuclear plan...

This is the scene at one shelter in sendai, japan where victims are still coping with their losses after the earthquake and tsunami devastated this region. at least 160 people living near japan's troubled power plant have been exposed to high levels of radiation and after new cooling problems just today, more radioactive steam will have to be released. senior medical correspondent elizabeth cohen has been following developments for us. how much do we know about the kind of radiation that these people are being exposed to? >> there's a lot that we don't know. and i'm glad you asked about the ...

Paula, thank you for that. what have you got there, stan? >> let's bring you up to date on the situation with the nuclear reactors. they are right about the nuclear emergency, the situation that is occurring with the two nuclear power reactors. now at the time of the quake, those reactors were shut down. that is what is expected to happen. there is an interruption to another power source which has led to the cooling problems. some parts are three times hotter than normal. that has led to radio active steam being released.

Station reactors with serious cooling problems, pressure building, reports of radiation venting at two of them. we'll stalk to a woman whose husband was in the plant. all the result of the fifth largest recorded quake in history, followed by this wave turning everything in its path into rubble. this is what it looked like. you can see it's not just seawater. there's debris, cars, trucks, houses being swept alone, battering everything in its path. the tsunami reaching the west coast where several people were swept out to sea. 8.9 was the quake, hundreds of times stronger than the one that level...

Being forthright and always telling the truth. so they should walk very carefully on this. let me tell you the three things that i've heard that are a cause of concern. one -- that are new developments today. one, i want to talk about that plant that you're referring to, the plant that's had a lot of problems, i want to save that for last. two other things have also happened. near those plants, there's a second set of plants, it was announced this evening on u.s. time that two of those plant, one or two of those plant, that their cooling system has failed. that's how we go into the problem wit...