NY Daily News 
January 23, 2013
Get ready for scan-and-frisk.
The NYPD will soon deploy new technology allowing police to detect guns carried by criminals without using the typical pat-down procedure, Police Commissioner Raymond Kelly said Wednesday.
The department just received a machine that reads terahertz — the natural energy emitted by people and inanimate objects — and allows police to view concealed weapons from a distance.
“If something is obstructing the flow of that radiation, for example a weapon, the device will highlight that object,” Kelly said.
Full story here.