Does the U.S. risk falling behind as skilled immigrants and foreign students return to work in their home countries? Worldfocus.org's weekly radio show explores the economic, political and social forces driving reverse brain drain. Listen now.

Though the U.S. has often been called the "land of opportunity," the country is losing some of its top minds to companies overseas. In a phenomenon known as reverse brain drain, highly skilled immigrants to the U.S. are returning to their home countries.