Mario Garcia sits in the doorway of his tire shop in Gracias a Dios, Guatemala, a short distance from the border with Mexico, watching the unfettered flow of migrants headed north. By his estimate, up to 1,000 migrants cross over into Carmen Xhan, Mexico, every day.
"This is an open border," Garcia says, with a knowing smile. "There's no immigration control on this side or the other side. Anyone can go across freely."