You know those "backscatter" full-body X-ray machines at airport security gates? Europe banned them several months ago because of health concerns, but the machines are still in use in some airports in the States.
The Transportation Security Administration (TSA) says the amount of radiation emitted by each scan is minuscule, but independent research suggests the dose to some parts of the body is at least 45 times higher than the TSA claims and may even increase cancer risk, particularly for the elderly and women predisposed to breast cancer. Since you're already going to be exposed to radiation by flying, avoid the extra rays and ask for a pat-down, says John Sedat, Ph.D., a professor emeritus at the University of California, San Francisco.
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