Grace Wyler profiles a new technology that “could make concealed carry obselete”:
Basically, Sarabandi and his team used the Doppler radar—which measures an object’s speed—to identify the general pattern of a human walking, or what he calls “the DNA of walking.” A computer is programmed to recognize that pattern, focusing on the subject’s chest, and then polarimetric radar is used to send out a signal at a particular polarization, and analyze the signal that bounces back. An irregular metal object—like a gun—would change the signal. Originally intended for military use, the gun radar would obviously be a huge gift to law enforcement and security officials, who could use it to scan a crowd for concealed guns in the same way they use highway radar guns to find speeding cars.
The Dish 