Get up to speed here on the whole airport security backscatter X-ray issue right here.
Since that time, Blogger Bob over at the TSA Blog took the time to say no biggee and point out this response from Health and Human Services.
Well, the UCSF crew remains unpersuaded:
Per John Sedat, a UCSF professor of biochemistry and biophysics and member of the National Academy of Sciences, “There are many misconceptions, and we will write a careful answer pointing out their errors. Because four people are working on this, it will not be done in one day.”