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Facebook founder, Mark Zuckerberg, has admitted making mistakes in mishandling data belonging to some 50 million of its users. In his first response to the controversy over the use of data, he's promised tougher steps. Is it sufficient? We put that to the Â鶹Éç's Media Editor Amol Rajan, who is in San Francisco. . (Photo: Mark Zuckerberg at a press conference at the Facebook headquarters in California in 2010, Credit: Gabriel Bouys/Getty Images)