From here: http://www.elliott.org/blog/tsa-watch-what-getting-your-freak-on-really-means-for-air-travelers/ Is this possible? We know that the backscatter units do penetrate some (small?) distance into the body, but based on the limited information we have, not deep enough for this to be true. Is it more likely that the TSA agent was trying to be humorous and happened to guess lucky (approximately 50% odds)? The other question is: what was this woman thinking going through the backscatter x-ray while pregnant?