How Do They Do It?
Emergency Bridges, Marker Pens still
S13E1222 min· aired 10/31/2016

Emergency Bridges, Marker Pens

TMDb0.0
Nexus es433721TMDb ep 1914946TVDb ep 6368356

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?