Javier Sicilia's caravan attracts only a small crowd in San Luis Potosí, near the territory of the notorious Zeta drug cartel. But for some of the victims who attended, it was their first time speaking out.
Conservation land in Mexico and a desalting plant in Arizona are at the center of a debate over the river.
At the border near Naco, Arizona, there are as many kinds of fences as there are ways over them.
In Yuma, Ariz., border patrol agents tout the success of a high triple-and double-layered wall. But such a fence is unlikely to stretch the entire border.