Twitter CEO Dick Costolo (C) and Twitter chairman Jack Dorsey (2nd R) await the opening of the NYSE Twitter Inc. IPO on the floor of the New York Stock Exchange, in New York, November 7, 2013. ... more 
Twitter CEO Dick Costolo (C) and Twitter chairman Jack Dorsey (2nd R) await the opening of the NYSE Twitter Inc. IPO on the floor of the New York Stock Exchange, in New York, November 7, 2013. REUTERS/Lucas Jackson (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) less 
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Reuters | Photo By LUCAS JACKSON / REUTERS
Thu, Nov 7, 2013 10:27 AM EST