Cameron and Obama Begin Their Final NATO Summit

President Barack Obama will confront global challenges his administration at his final NATO summit beginning on Friday, including a fraying European Union, a resurgent Russia, and an intractable conflict in Afghanistan. British Prime Minister David Cameron in his first post-Brexit summit is said to pledge thousands of troops, whilst arguing that Britain is still relevant to its continental allies even as it prepares to extricate itself from its 43-year membership in the European Union. Bloomberg's Marc Champion reports on "Countdown."

Rolling Stone Sale a New Beginning, Says Mediatech's Bibb
55:13 - Porter Bibb, managing partner at Mediatech Capital Partners, discusses the origins of Rolling Stone as the controlling stake in the magazine goes up for sale. He speaks with Bloomberg's Tom Keene on "Bloomberg Surveillance." (Source: Bloomberg)
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