The issues of birthright citizenship, and so-called anchor babies, have a way of flaring tempers. For now, anyway, the children of illegal immigrants born in this country are allowed to live here with the same rights as any other citizen, assuming they were born in this country. But it often happens that the children don’t live here once their parents are caught and sent home. In a joint report from the Fronteras public radio project, Peter O’Dowd and Nadine Arroyo Rodriguez visited a small town in Guatemala, where more than a dozen American children live.