Less than 10 miles from the Mexican border, a vacant lot in Sierra Vista, Ariz., looks like a trash dump. Between the chaparral and scrub oaks are backpacks, sweatshirts, jeans, sneakers, used toilet paper and water bottles filled with urine. Chris Simcox, a small-town newspaper owner, flips through a book he picked out of the refuse titled Aprenda Ingles sin Maestro (Learn English Without a Teacher), shakes his head and says, "Welcome to the invasion."
More than 500,000 illegal aliens were caught last year in southern Arizona alone, accounting for 52% of all undocumented migrants detained in the U.S. in 2004....