Three walls. Makes sense –– might've made sense back home, too, if there weren't a staggering lack of bodies and materials to make it possible without massive losses.

Tess shakes her head in disgust.

"Pretty shitty odds," she remarks. "I don't really know what our population is like anymore, but we lost sixty percent of the country in a three month period, twenty years ago. We've probably lost most what's left since. You guys probably lost lots of farmland losing that wall, right? The inner area is probably a city."