The US is still a magnet for top foreign students — for now

We need foreign-born researchers and scientists for America to not only succeed, but lead. | Anadolu /Getty Images For most of the 20th century, the center of gravity in science was anywhere but the US. On the eve of World War II, the great laboratories were in Europe, and American research — especially in physics — was widely seen as trailing them.  Then came the “scientific exodus”: Foreign refugees from fascism — like Einstein, Fermi, Bethe, Szilard, von Neumann, and others — remade US science. One reason we won the war is because America collected foreign talent while its enemies