This is rather scary stuff:
Liberty Defense is developing Hexwave, a new disruptive technology that was exclusively licensed from the Massachusetts Institute of Technology (MIT) uses 3D radar imaging and artificial intelligence to detect concealed weapons in urban settings.
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Hexwave could be the next technology that replaces X-ray machines, such as for scanning bags in airports or other venues, and it also provides 3D scans of a person’s exterior as where X-ray can only provide 2D scans.
“Hexwave provides 3D imaging at a rate that is in real time — it can assess for threats while the person is still walking, which means it is well suited for higher, faster throughput,” Riker told VentureBeat.
The urban security market by 2020 to 2025 in North America is set to increase by 33%. The new 3D detection machine can revolutionize security at indoor high traffic crowded areas, like schools, malls, hotels, and places of worship, and protect outdoor high traffic areas, like airports, sports venues, government buildings, and bus/subway stations.
Will this sneak by the Fourth Amendment? If used in a common access public place, does this constitute an unwarranted search? The courts danced around the Fourth Amendment issues when doing searches at airports by saying, in essence, “You can still drive, ride a bus, and walk without being searched hence you are consenting to these searches.”
Also of great concern is the often used phrase “concealed means concealed” will no longer be true. Statists will use this technology to claim you don’t need to have a gun to protect yourself because they have the ability to prevent bad guys (everyone except agents of the state) from having a gun. While individual and groups of criminals are of obvious concern and a reasonable justification for private ownership and carry of self-defense firearms that isn’t the primary reason we have the Second Amendment. The primary reason is defense against the state. This technology could tip the balance in favor of dependency of the state for personal protection. This leading to inability to justify in the public eye the private carry and eventual ownership of firearms. This, of course, puts people at great risk of wholesale slaughter when our government goes completely rogue:

