"She's going to show up at the Mexican border once she finishes the marathon to her car," Fletch says. I nod. "Sounds like it, yes." "And she's confident the border guards will simply stand there with open arms, all, 'Oh, apocalypse in the USA? So sorry. Come on in, friendly Northern Neighbor! You're totally welcome to all our resources! Here, have a chimichanga, senorita! You must be tired after your long trek."