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A special edition of Hardtalk from Cannes, which is currently hosting the world’s advertising industry. Thanks to the internet, advertising and marketing now have the ability to reach deep into the fabric of our lives. No one has exploited that better than today’s guest – Sir Martin Sorrell, the founder and CEO of the giant advertising conglomerate, WPP. The ad industry is extraordinary powerful, but is it responsible?

(Photo: WPP Group CEO Sir Martin Sorrell at FOX Studios in New York, 2015. Credit: Slaven Vlasic/Getty Images)