How Do They Do It?

S13E1222 min· aired 10/31/2016
Emergency Bridges, Marker Pens
TMDb0.0
Overview
How do they build emergency bridges that can take the weight of a tank, make a marker pen that never fades, and design a 200-mph superbike?

How do they build emergency bridges that can take the weight of a tank, make a marker pen that never fades, and design a 200-mph superbike?