Immigration has always been part of the fabric of America's history and its future. However, the emphasis on high-skilled workers-today's foreign graduates at US universities with advanced degrees in science, technology, engineering, and math-is a fairly new phenomenon. The effects of "reverse brain drain" are becoming increasingly common, as professionals have begun taking knowledge and skills they've learned in America back to their home countries. Policymakers are realizing that foreign students are not only a major pipeline to innovators, but are also the catalysts behind the growth of...