When you think of 3D printing, you may envision useless trinkets, a cheesy iPhone cover, or extruded cheese doodles. But that would be so 2014 of you!

In this episode of Miles To Go, Miles sits down with John Hart, an MIT Engineering Professor and Entrepreneur who is leading the way to a new era in 3D manufacturing. If things go as he plans, it could change just about everything.

Siegfried Hecker is a Metallurgist and Nuclear Scientist. He served as the director of the Los Alamos National Laboratory from 1986-1997 and is a professor at The Center For International Cooperation at Stanford University. One of the few people who have actually visited North Korea's nuclear facilities, Hecker recently sat down with Miles To Go to discuss the development and capabilities of North Korea's nuclear arsenal.

Eugene Tseng describes himself as the most "overeducated garbage man" in the world. An environmental engineer and lawyer who teaches at UCLA and Cal State Northridge, he has spent decades understanding what we throw away and what happens to it after the garbage truck picks up the bag on your curb. Obviously, it's not a pretty picture, but it's worse than you think. We all can do better. The first step: listen to this podcast… Oh, and of course we will ask him about the oddest things he's found in the landfill. Could diapers be radioactive? Depends...

In July of 2017, an Air Canada passenger jet loaded with 135 passengers and 5 crewmembers nearly landed on a taxiway at San Francisco International Airport, where four jets were waiting to take off.

At the last moment, the pilot aborted the landing, averting what could have been the worst aviation accident in history. How was this possible in this day of automation and super-accurate GPS navigation? Join Miles and Lars Perkins to find out.