But monitoring whether people make their own guns on a 3-D printer is going to be impossible, barring sticking an A.T.F. agent in every home. It's also hopeless to try to build a technology into these printers that prevents people from printing a gun. One project mentioned in Mr. Wilson's video, called the RepRap printer, will be capable of replicating itself by printing other 3-D printers.
After committing a crime with a printed weapon, a person could simply melt down the plastic and reprint it as something as mundane as a statue of Buddha. And guns made of plastic might not be spotted by metal detectors in airports, courthouses or other government facilities.
"This becomes scary when you consider the fact that it could be yet another opportunity for people to evade background checks and get a gun," said Daniel Gross, president of the Brady Campaign to Prevent Gun Violence and the Brady Center to Prevent Gun Violence.
|Printing The Moon Base|
|Diamond Batteries Are Forever #diamondbattery|
|Attenborough Design Group|
|Samsung Introduces Dick Tracy's Watch|
|iPad the Right Fit for Sumo Wrestlers|
|“There are over a billion people who have no access to energy what-so-ever.”|
|“How do you communicate wirelessly with WiFi using only plastic?”|
|The 24 Carrot Cake|
|“Tesla's Model S has outsold traditional high-end models from established European brands.”|
|Japanese Robot Serves Ice Cream From Inside a Vending Machine|
|CaptchaTweet: Write Tweets in Captcha Form|
|“We estimate the dynamical lifetime of the Tesla to be a few tens of millions of years.”|
|How to Avoid Jury Duty|
|The (Very Scary) People of Public Transit|
|“We are considering public transport free of charge in order to reduce the number of private cars.”|
|“Facebook is a declining power.”|
|“What happens when anyone can make it appear as if anything has happened, regardless of whether or not it did?"|