welcome back. if you re just joining us, here s the latest news you node need to know right now. several aftershocks hit japan about an hour ago just after dawn. no tsunami was generated, but the strongest shocks were off fukushima prefecture, the site of that crippled nuclear plant. the plant s owner says the technicians restored power to the number three control room today and hope to turn on the air conditioning so workers can reenter that room. 53% of americans think a dangerous amount of radiation from japan will reach the united states. the experts say that s highly unlikely but we thought it was a good subject of conversation for our chief medical correspondent, dr. sanjay gupta. sanjay, start with a little radiation contamination 101. how does radiation get into the food supply?
smoke emanating from reactors number two and three resulted in workers being evacuated and efforts to get plant under control were halted. radiation contamination for the crippled plant has affected area food supply and trace radiation has been found in the sea water around there. nbc s lee townsend in seoul, korea, with the latest. lee, it seems like a bad day in terms of this nuclear problem over there. reporter: well, it was. they were making some progress. they were happy about the fact they restored power. they were happy that some of the reactors, number five and six, weren t really a big issue early on are now considered stable but then all of a sudden we had smoke from reactor number two. not sure what it was. they evacuated the workers. about two hours later the smoke dissipated. they thought everything was okay and then more smoke started coming from reactor number two. they re still not exactly sure what it was. they don t think it was from the spent fuel pool however.
shelves almost out of food, radioactive steam spewing into the air, but live goes on, japanese style. patience, politeness are the natural order of the day. how serious is the nuclear radiation that is getting out? do you know the extent of the damage. and i mean tokyo standing outside under the sky. and i do not have any concerns about radioactivity or exposure. the government tested people for radiation exposure. as a partial melt down occurred in reactor number three. the cooling system in reactor number two failed and more radioactive steam was released. there are three separate reactors now people are worried about. we know there are 19 scientists on one site where they re going through and checking each person to see what radiation contamination they ve been exposed to. the owners of the power
spinach taken off the shelves because of radiation contamination. how safe is the u.s. supply? we ll check in with elizabeth cohen. set it in motion. and it goes out into the world like fuel for the economy. one opportunity leading to another. and another. we all have a hand in it. because opportunity can start anywhere, and go everywhere. let s keep it moving.
limiting sales of water, shelves almost out of food, radioactive steam spewing into the air, but live goes on, japanese style. patience, politeness are the natural order of the day. how serious is the nuclear radiation that is getting out? do you know the extent of the damage. and i mean tokyo standing outside under the sky. and i do not have any concerns about radioactivity or exposure. the government tested people for radiation exposure. as a partial melt down occurred in reactor number three. the cooling system in reactor number two failed and more radioactive steam was released. there are three separate reactors now people are worried about. we know there are 19 scientists on one site where they re going through and checking each person to see what radiation contamination