You won't recognise London's hottest old district Contains:
The photos that are taken are not supposed to be saved or shared, but that apparently is not always the case.
He also claimed that TSA officers had code words for passengers, including "Alfalfa", "Code Red" and "Fanny Pack" for attractive females passenger through security.
The machines used X-rays, a form of ionizing radiation that reflects off of organic material and forms an image, thereby producing an essentially nude photograph of the passenger standing in the scanner.
A bit of background:
The first was of the opinion that no one should see her nude.
The top photo shows the old backscatter scanners with the full body outline.