Fleming Crim is assistant director for the NSF Directorate of Mathematical and Physical Sciences. Crim leads a staff of nearly 180 and oversees an annual budget of $1.3 billion, with the directorate supproting core research in astronomy, chemistry, physics, material science and mathematics. Late last month, I testified before the U.S. Congress alongside three leading physicists about a topic largely unknown on Capitol Hill: gravitational waves .
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