Rising higher education costs are damaging the United States' ability to compete globally, especially in the areas of science and technology, according to experts who testified before the Senate Finance Committee Thursday. Less student interest in the fields of science and math, and decreases in the number of doctorate degrees being awarded in science are also harmful, said panelists at the hearing. And the complexities of federal aid programs make it less likely those programs will be beneficial. We either drive it [higher education] or we're going to be driven by the global competition, said Sen. Charles Grassley, R-Iowa, who...