BARCELONA, SPAIN - MARCH 02: Founder and CEO of Facebook Mark Zuckerberg speaks during his keynote conference during the first day of the Mobile World Congress 2015 at the Fira Gran Via complex on March 2, 2015 in Barcelona, Spain. The annual Mobile World Congress hosts some of the wold's largest communication companies, with many unveiling their latest phones and wearables gadgets. (Photo by David Ramos/Getty Images)
