BARCELONA, SPAIN - FEBRUARY 21: Founder and CEO of Facebook Mark Zuckerber gives his speach during the presentation of the new Samsung Galaxy S7 and Samsung Galaxy S7 edge on February 21, 2016 in Barcelona, Spain. The annual Mobile World Congress will start tomorrow and will host some of the world's largst communication companies, with many unveiling their last phones and gadgets. (Photo by David Ramos/Getty Images)
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