As winter arrives, airports dust off their deicing equipment and ready for another season of cold, snow, and ice. While a car may be safely operated partially covered in ice or snow, aircraft must be completely free of contamination to assure a safe flight. Deicing can sometimes lead to flight delays, but the alternative is far worse. We spoke with Andrew Poure, a former aircraft deicer, to learn more about what goes in to deicing a plane and how the orange or green liquid being sprayed on the plane actually works.