Twitter and Square Founder Jack Dorsey speaks at TechCrunch Disrupt SF 2012 in San Francisco

 
Twitter and Square Founder Jack Dorsey speaks at TechCrunch Disrupt SF 2012 in San Francisco
Jack Dorsey, founder of Square and Twitter, speaks on stage during day one of TechCrunch Disrupt SF 2012 event at the San Francisco Design Center Concourse in San Francisco, California September 10, 2012. REUTERS/Stephen Lam