AGUA DEL ESPINO, Mexico - The two women worked in silence. Laura Teresa Gomez Santos patted a ball of masa and slapped it onto a tortilla press. Her husband's mother, Ignacia Zavaleta Rios, stirred a pot of simmering black beans. They tried to hush the barking dogs and quiet the roosters, afraid they might miss the sound of the phone. Laura's husband, Celestino Garcia Zavaleta, 20, had been caught by Border Patrol while trying to cross into the United States. Two days before, one of his brothers, who lives in the United States, had called to say Celestino had been...