Given the credability of the TSA and DHS regarding the safety of these machines (details and proof of such safety is classified)

Id say, that all images are saved by the TSA/DHS for 'security' purposes. Umntil there is physical proof of this not being the case, We should assume that the TSA is lying and that imigages are infact saved.

Remember the TSA makes up rules as it goes along, and doesnt trust you, they sexually molest your spouses, and your children, they consistantly use dirty gloves and continue to trample on the rights liberties and freedoms of American Citizens...

Believing these images are not saved, like the TSA claims, is like believe the earth is indeed flat, and not round.