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A man (L) tries to attack News Corp Chief Executive and Chairman Rupert Murdoch with a white substance during a parliamentary committee hearing on phone hacking at Portcullis House in London July 19, 2011. REUTERS/Parbul TV via Reuters Tv (BRITAIN - Tags: CRIME LAW MEDIA IMAGES OF THE DAY BUSINESS) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS