Yeah I'm serious. NYPD is known to have had "X-ray" vans for several YEARS now and I figure many other departments have them as well now. As for them using radio waves instead of x-rays, x-rays pass through most materials like light passes through a chain link fence, due to the wavelength being much shorter than the distances between atoms (usually).

Yeah I'm serious. NYPD is known to have had "X-ray" vans for several years now and I figure many other departments have them as well now. As for them using radio waves instead of x-rays, x-rays pass through most materials like light passes through a chain link fence, due to the wavelength being much shorter than the distances between atoms (usually).