and we thought of nuclear fear. it's a scare rye thing for us. when we are afraid we personalize the risk. we here it's japan. megyn: they say a radiation cloud will hit the west coast on saturday. >> reporter: as trace said the key fact that is mission, what levels? the amount of radiation you would need to increase your cancer risk by 5% is about 1,000milliseiverts. no one is going to see anything near that. i'd be concerned in the area. megyn: in fukushima. >> reporter: they were worried in europe about radiation clouds after chernoble. and for 25 years that's been studied and there's been no increased cancer risk found. cancer is another thing that scarce us. we are afraid of the radiation and the cancer if i were on the west coast i'd be afraid of the potassium iodide pills.