ATF Reveals Results of Tests on 3D Printed Guns

Law requiring screening technology to detect all kinds of firearms set to expire next month

Washington (CNN) -- A federal law requiring that screening machines commonly found at schools, courthouses and other public facilities be able to detect all types of firearms will expire in less than a month.

And that deadline is suddenly very relevant because of the availability of lethal 3-D printable guns that contain virtually no metal, law enforcement authorities say.

(H/T Charles WT)