Originally Posted by RustyShackleford1

How can I determine if the WBI machine used at my airport
(RDU) are the millimeter-wavelength kind or the backscatter
X-ray ? I have health concerns about the latter.
(I have other concerns too, but I don't wish to get into them in
THIS thread, and they are thoroughly discussed elsewhere in this
forum).

P.S. I wonder if it would be considered a threat if you calmly
informed a TSO planning to pat-down you, or a loved one (and
you're witnessing), that you are a 4th-degree black-belt in
TaeKwonDo ?