https://www.brookings.edu/articles/an-offline-conversation-with-twitter-ceo-dick-costolo/
An Offline Conversation with Twitter CEO Dick Costolo | Brookings
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https://daringfireball.net/linked/2011/10/18/costolo
Daring Fireball: Twitter CEO Dick Costolo at Web 2.0
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https://www.cbsnews.com/video/dick-costolos-speech-2014-pentoni-and-james-c-goodale-digital-freedom-award/
Dick Costolo's speech: 2014 PEN/Toni and James C. Goodale Digital Freedom Award - CBS News
The Twitter CEO accepted this inaugural award for his company's contribution of "a powerful new tool for communication and expression to hundreds of millions...