Early in the Period of Death, the drug cartels of Central America and northern South America welcomed the millions of people from the north into their gigantic pens from which there was no escape. The pens were dozens of miles on a side; it was hell on earth, as the only thing there was to eat was each other. The gangs survived the apocalypse by trading, killing and eating these millions of victims. And when the captives were gone, the gangs ate each other. But some survived.