NYTimes.com: "Migrant shelters along the Mexican border are filled not with newcomers looking for a better life, but with seasoned crossers: older men and women, often deportees, braving ever-greater risks to get back to their families in the United States — the country they consider home.
They present an enormous challenge to American policy makers, because they continue to head north despite obstacles more severe than at any time in recent history. It is not just that the American economy has little to offer; the border itself is far more threatening. On one side, fences have grown and American agents have multiplied; on the other, criminals haunt the journey at every turn.
And yet, while these factors — and better opportunities at home — have cut illegal immigration from Mexico
to its lowest level in decades, they are not enough to scare off a sizable, determined cadre."