National Public Radio: SCOTT SIMON, HOST: Oklahoma's on a track to have a record year of earthquakes. More than 5,000 have already been group recorded, and those quakes appear to endanger the industry that created them. The ground is shaking near Cushing, Okla., home to the largest commercial crude oil storage center in North America. As Joe Wertz from StateImpact Oklahoma reports, researchers say the earthquakes could compromise the economically vital energy hub. JOE WERTZ, BYLINE: This little patch of prairie in northeastern...