“I have learned to live with trash,” said fifth-generation Arizona rancher Jim Chilton.He saw his once-beautiful ranch, just a few miles from the border with Mexico, is now dotted with clusters of crushed trees and cactus, whole hillsides have been turned into charred eyesores, years worth of his award-winning conservation projects obliterated — and the whole thing is littered with trash, tons and tons of trash. And some of the trash was dead bodies. Chilton had the misfortune of settling in the path of what would become a dangerous drug- and human-smuggling route on the U.S.-Mexican border, parallel with the...