Of the nine people who shared this year's Nobel Prizes in chemistry, physics and medicine, eight are American citizens, a testament to this country's support for pioneering research. But those numbers disguise a more important story. Four of the American winners were born outside of the United States and only came here as graduate or post-doctoral students or as scientists. They came because our system of higher education and advanced research has been a magnet for creative talent.

Unfortunately, we cannot count on that magnetism...