"The Centre for Machine Vision is also investigating how 3D research could help to identify threats like guns or explosives concealed beneath clothes. The device is so effective that it can reveal, for example, not just the location of a weapon, but also the type as well." Sounds like we need better concealed carry holsters.
I would not say the world has become paranoid.... more like our government is paranoid of its people and their actions/intent. They know we are being pushed into a corner with over-taxation, regulation and an outright trampling of our constitutional rights.....they fear one of these days soon, we are going to throw the tea into the harbor... and pull out our 2nd amendment tools to fix the problem. IMO YD