https://www.cnet.com/news/this-phone-case-turns-your-iphone-8-plus-or-pixel-2-xl-into-an-x-ray-machine/

Some phone cases give you more battery life or wireless charging. But how about a case that can scan people for hidden weapons?

That's exactly what Royal Holdings, a Los Angeles-based startup focused on real-time intelligence and threat detection, and run by former intelligence contractor Barry Oberholzer, aims to do with its SWORD smartphone attachment.