Like it or not, advanced imaging technology (AIT)–capable of producing highly detailed pics of your naked body–is expanding rapidly throughout U.S. airports. Last month, there were at least 142 AIT units deployed in eleven airports, but by the end of the year that will jump to more than 450 nationwide, spread across at least forty airports (see full list below). The TSA has tried to downplay privacy issues by saying that the units won’t save images, but that doesn’t mean that they can’t. In fact, the U.S. Marshals Service in Florida says they’ve got over 35,000 AIT scans of people saved. They also say that an AIT unit tested in the Washington, D.C. federal courthouse was sent back to the manufacturer with images still stored on it.