Changes

==Three dimensional printers==

==Three dimensional printers==

Until recently, guns were manufactured in factories to exacting specifications and careful engineering.  If a gun was not carefully made, it could explode in the user's hand and would be unsafe.  With the advent of 3D printers and strong composite plastics, hand guns can be made which would be difficult to detect by traditional metal detectors.<ref>{{cite news|url=http://www.wired.com/2014/05/3d-printed-guns/|title=How 3-D Printed Guns Evolved Into Serious Weapons in Just One Year|work=Wired Magazine|date=May 15, 2014|accessdate=April 3, 2016}}</ref><ref>{{cite news|url=http://www.npr.org/sections/alltechconsidered/2013/11/14/245078880/plastic-guns-made-with-3-d-printers-pose-new-security-concerns|title=Plastic Guns Made With 3-D Printers Pose New Security Concerns|work=NPR|date=November 14, 2013|accessdate=April 3, 2016}}</ref>

Until recently, guns were manufactured in factories to exacting specifications and careful engineering.  If a gun was not carefully made, it could explode in the user's hand and would be unsafe.  With the advent of 3D printers and strong composite plastics, hand guns can be made which would be difficult to detect by traditional metal detectors.<ref>{{cite news|url=https://www.wired.com/2014/05/3d-printed-guns/|title=How 3-D Printed Guns Evolved Into Serious Weapons in Just One Year|work=Wired Magazine|date=May 15, 2014|accessdate=April 3, 2016}}</ref><ref>{{cite news|url=http://www.npr.org/sections/alltechconsidered/2013/11/14/245078880/plastic-guns-made-with-3-d-printers-pose-new-security-concerns|title=Plastic Guns Made With 3-D Printers Pose New Security Concerns|work=NPR|date=November 14, 2013|accessdate=April 3, 2016}}</ref>

==See also==

==See also==