I frequently have conversations with the TSA about their machines. They have been trained to discuss the differences between backscatter x-ray &amp; MMW technology to allay concerns about the health risks associated with the former, especially in airports that only use the latter. They&#x27;re typically very surprised to find that I&#x27;m very clear on the differences, and that my objection rides on the privacy implications rather than health concerns. Call me old fashioned, but we shouldn&#x27;t let it become <i>normal</i> for the government to scan your body as a precondition to travel.