Jack Dorsey Jack Dorsey

Milo Yiannopoulos, a conservative writer and Internet personality, holds a news conference down the street from the Pulse nightclub in Orlando, Fla., last month. Drew Angerer/Getty Images hide caption

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Drew Angerer/Getty Images

A worker unveils a floor mat bearing the logo of Twitter on the floor of the New York Stock Exchange. Andrew Burton/Getty Images hide caption

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Andrew Burton/Getty Images

Nick Bilton On Twitter's Creation Myth & 'Forgotten Founder'

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