Backscatter Machines News Today

University of california finds that passengers shouldnt be too worry. senior medical correspondent elizabeth cohen joins us now. what have you learned? what does this tell us about the radiation? >> this report is really interesting because it tries to put things in terms regular people can understand. were talking about radiation, it gets confusing. >> yes. >> basically it found when you go through one of these backscatter machines at the airport, youre getting radiation. but one scan gives you...