GONZAGA, Brazil -- Horse-drawn buggies still deliver milk door to door in this sleepy Brazilian town, while young men flush with dollars and euros open stores and buy fully loaded four-wheel-drive pickup trucks. Gonzaga, the remote hometown of the Brazilian electrician killed in London when he was mistaken for a suicide bomber, is at the center of a mostly illegal migration boom from Latin America's largest country to the United States and Europe. There's no end in sight, even with the death of 27-year-old Jean-Charles de Menezes, shot seven times in the head on the subway on his way to...