geoffrey supran and naomi oreskes say they're not making judgments on specific legal issues, but it ishly likely this scientific take on the politics of climate change will be injected into the legal process, william. >> all right, as always, miles o'brien, thank you so much. >> you're welcome, william. >> brown: finally, a british rock star with a new take on the birth of rock and roll. jeffrey brown has the story. ♪ ♪ >> brown: billy bragg first rose to fame as a punk rock and folk musician in the early 1980s. ♪ ♪ now nearing 60, he's still singing hard-edged songs of protest and passion, here recently at the birchmere music hall in alexandria, virginia. ♪ ♪ in a new book: "roots, radicals and rockers" he's also looking back to an even earlier, lesser known but important moment in music history... ♪ ♪ ...when a pop star named lonnie donegan and others took britain by storm in the mid-50s with a phenomenon called skiffle music. >> what donegan does, he's the first british artist to get in the charts playing a guitar, and he begins the process of turning british pop into a guitar-led m