WPP's Sorrell: Twitter Is Still an Unproven Medium

Nov. 7 (Bloomberg) -- Sir Martin Sorrell, CEO & founder at WPP, explains how WPP works Twitter into its advertising plans for companies and examines Twitter’s ad growth potential. He speaks on Bloomberg Television’s “Bloomberg Surveillance.”
Saudi Arabia Pledges More Airstrikes as U.N. Talks Begin
22:32 - Saudi strikes against Yemen rebels continued overnight as the gulf states reached out to members of the U.N. Security Council for a possible arms embargo. Bloomberg’s Elliott Gotkine reports on “Countdown.” (Source: Bloomberg)
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