Bloomberg by the Numbers: 10

Photograph by Robert MacPherson/AFP via Getty Images

A Liberator pistol next to the 3D printer on which its components were made.

That’s how many years the extension on the federal ban against weapons that can evade metal detectors will last.

In a capital where leaders have been unable to agree on any significant gun controls in the year since the shooting of 20 first-graders and six educators in Newtown, Connecticut, the president has signed a bill continuing a ban against plastic guns.

The law applies to any weapon that can evade the detection of X-rays or metal detectors, and is targeting the modern proliferation of guns that can be assembled with 3-D printers. The law, first enacted in 1988, was set to expire. The Senate approved it last night.

The action arrives days ahead of the anniversary of the Dec. 14 shootings at Sandy Hook Elementary School in Connecticut. Attempts to toughen background checks for gun-buyers failed earlier this year in the Senate, lacking the super-majority of votes needed.

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