This is an excellent set of slides, but most of the U.S. state maps make no sense. He explains the colors in the 46-minute video[1], but it's a shame he didn't

This is an excellent set of slides, but most of the U.S. state maps make no sense. He explains the colors in the 46-minute video[1], but it's a shame he didn't put legends on the maps. [1] https://media.defcon.org/DEF%20CON%2021/DEF%20CON%2021%20slides/DEF%20CON%2021%20Hacking%20Conference%20Presentation%20By%20Pukingmonkey%20-%20The%20Road%20Less%20Surreptitiously%20Traveled%20-%20Slides.m4v https://media.defcon.org/DEF%20CON%2021/DEF%20CON%2021%20sli... I still don't understand what he means by the map for "Latest Model Year for YOM" [year of manufacture] even after watching the relevant part of the video (at 19m38s).