All has been forwarded to an automated voice messaging system.

At the tail and please record your message.

When you've finished recording you may hang up or press one for more options.

Hey summer intern Brie, it's me, it's Sean, the host of today explained.

I think you're just outside at the desks and I'm here in the studio and I wanted to call

you just maybe one last time to tell you that Uber is moving forward.

They've got a bunch of new features in their app to prove it and you can learn more about

them at uber.com slash moving forward.

I hope I can catch you by the middle of the show.

Andy Greenberg from Wired knows a lot about 3D guns.

I started writing about 3D printed guns in 2012 before they even existed.

I'm told that you have a 3D gun, is that true?

No, I don't have one.

I made a, I wouldn't say it's a 3D printed gun.

Some people call it a ghost gun.

I made the lower receiver of an AR-15, which is the only part of an AR-15 that's regulated.

Then you buy all the other parts and you have essentially an unregulated, untraceable,

semi-automatic, fully metal firearm.

It is a weird feeling to build a semi-automatic rifle in the back room of Wired's office

and nobody really knows what I'm doing.

I'm not interacting with any government or regulatory people at all.

I'm not showing ID to anyone.

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