Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twitter is pictured at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey, CEO of Twotter speaks at the digital fair dmexco in Cologne, Germany, 13 September 2017. Photo: Rolf Vennenbernd/dpa
Jack Dorsey and Evan Williams of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz at Lincoln...
Jack Dorsey, Evan Williams and Biz Stone of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz...
Andrew Ross Sorkin and Jack Dorsey speak onstage during The New York Times 2017 DealBook Conference at Jazz at Lincoln Center on November 9, 2017 in...
Andrew Ross Sorkin and Jack Dorsey speak onstage during The New York Times 2017 DealBook Conference at Jazz at Lincoln Center on November 9, 2017 in...
Jack Dorsey attends The New York Times 2017 DealBook Conference at Jazz at Lincoln Center on November 9, 2017 in New York City.
Jack Dorsey speaks during The New York Times 2017 DealBook Conference at Jazz at Lincoln Center on November 9, 2017 in New York City.
Jack Dorsey speaks during The New York Times 2017 DealBook Conference at Jazz at Lincoln Center on November 9, 2017 in New York City.
Jack Dorsey speaks during The New York Times 2017 DealBook Conference at Jazz at Lincoln Center on November 9, 2017 in New York City.
Jack Dorsey of Twitter, musician M.I.A. And Musician Ben Brewer attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose...
Evan Williams, Biz Stone and Jack Dorsey of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz...
Elizabeth Hasselbeck, Jack Dorsey of Twitter, Barbara Walters and Sherri Shepherd attends the Time's 100 Most Influential People in the World Gala at...
Whoopi Goldberg, Joy Behar, Elizabeth Hasselbeck, Jack Dorsey of Twitter, Barbara Walters and Sherri Shepherd attends the Time's 100 Most Influential...
Whoopi Goldberg, Joy Behar, Elizabeth Hasselbeck, Jack Dorsey of Twitter, Barbara Walters and Sherri Shepherd attends the Time's 100 Most Influential...
Whoopi Goldberg, Joy Behar, Elizabeth Hasselbeck, Jack Dorsey of Twitter, Barbara Walters and Sherri Shepherd attends the Time's 100 Most Influential...
Evan Williams, Biz Stone and Jack Dorsey of Twitter attends the Time's 100 Most Influential People in the World Gala at Rose Hall - Jazz at Lincoln...
Editor-at-large for TIME Mark Halperin, Jack Dorsey, Biz Stone and Evan Williams of Twitter attend Time's 100 Most Influential People in the World...
Evan Williams, Biz Stone and Jack Dorsey of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz...
Jack Dorsey, Evan Williams and Biz Stone of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz...
Actress Kate Hudson and Jack Dorsey of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz at...
Actress Liv Tyler, actress Kate Hudson and Jack Dorsey of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P....
Actress Liv Tyler, actress Kate Hudson and Jack Dorsey of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P....
Evan Williams, Biz Stone and Jack Dorsey of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz...
Jack Dorsey of Twitter, musician M.I.A. And Musician Ben Brewer attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose...
Jack Dorsey and Evan Williams of Twitter attend Time's 100 Most Influential People in the World Gala at the Frederick P. Rose Hall at Jazz at Lincoln...
Journalists listen to technology executives seated from left to right: Ahmad Hamzawi and Kannan Pashupathy of Google, Scott Heifermen of Meetup,...
Technology executive Jack Dorsey of Twitter gestures as he speaks following a press conference at the US Embassy in Baghdad's fortified 'Green Zone'...
Technology executive Jack Dorsey of Twitter speaks following a press conference at the US Embassy in Baghdad's fortified 'Green Zone' on April 22...
Technology executives seated from left to right:- Raanan Bar-Cohen of Automatic, Jack Dorsey of Twitter and Hunter Walk of You-Tube listen on during...