The mighty Columbia River has helped power the American West with hydroelectricity since the days of FDR’s New Deal. But the artificial intelligence revolution will demand more. Much more.So near the river’s banks in Central Washington, Microsoft is betting on an effort to generate power from atomic fusion — the collision of atoms that powers the sun — a breakthrough that has eluded scientists for the past century. Physicists predict it will elude Microsoft, too.The tech giant and its partners s...