Former CIA Chief of Disguise shares how spies use disguises

Jonna Mendez is a real master of disguise. In this fascinating Wired video, the now-retired CIA Chief of Disguise talks about how and why spies are masked so their cover isn't blown.
'You want to be the person who gets on the elevator... and nobody even remembers that you were really there. That is a design goal at disguise labs at CIA.'
Fascinating stuff!