First Working Prototype Of A 'Quantum Radar'

The device works along the same principles as a normal radar, except instead of sending out radio waves to scan an area, it uses pairs of entangled photons. 

Seeing through walls: new radar technology provides real-time video of what’s going on behind solid walls

The ability to see through walls is no longer the stuff of science fiction, thanks to new radar technology. Researchers have built a system that can see through walls from some distance away, giving an instantaneous picture of the activity on the other side.