Apparently it is not enough for the Transportation Security Administration in the US to have access to strip search X-ray scanner images of airport passengers they seem to think that it is perfectly OK to search a half naked kid too.
The guy who filmed this invasive TSA airport search claimed in during an interview in the Glenn Beck program that airport security staff questioned him about his videotaping of the incident and repeatedly asked him to erase the video to which he refused.
Advice for USA airport travellers
According to TSA rules travellers can not be asked to remove clothing (other than shoes, coats, and jackets) at a TSA checkpoint, if TSA staff asks you to remove your clothing ask for a supervisor or manager to speak with.
Remember that your laptop computer can also be searched when taking a flight, you should use full disk encryption to stop the TSA staff from getting their noses in your own business.