article_snippet: Wedged between cargo cars, perched on tanker tops, stuck in stuffy boxcars, with money sewn into shirt cuffs and pants hems, they hop on, often in daylight, high noon even, because arresting impoverished migrants has not, historically, been a top priority in Mexico .
article_snippet: But the U.S. border is porous, and, says Mexico's immigration commissioner, Hipolito Trevino, 'Mexico's immigration commissioner, Hipolito Trevino cannot stop Mexico's immigration commissioner, Hipolito Trevino'
article_snippet: But this southern border is porous, and, says Mexico's immigration commissioner, Hipolito Trevino, 'Mexico's immigration commissioner, Hipolito Trevino cannot stop Mexico's immigration commissioner, Hipolito Trevino.'
article_snippet: Wedged between cargo cars, perched on tanker tops, stuck in stuffy boxcars, with money sewn into shirt cuffs and pants hems, they hop on, often in daylight, high noon even, because arresting impoverished migrants has not, historically, been a top priority in Mexico.