Police Commissioner Ray Kelley says the NYPD will begin using technology this year that can see through clothing.
"We've been looking at it for several years, looking at it with the Department of Defense, and also Metropolitan Police in London," he said on CBS News' Face the Nation.
New technology called Tera-Hertz scanners or T-Ray machines can be used to detect whether a person is carrying a concealed firearm. The new device utilizes T-rays, which pass through fabric and paper, but not cannot pass through metals.
"Basically, everyone emits Tera-Hertz radiation and if that radiation is blocked by something such as a weapon, you can see the outline of it," Kelly explained.