kevin systrom: i was. i wouldn't say i was a jock. ily: when did you start becoming interested in technology? kevin: i remember when my dad got our first computer at home, and i played video games all the time. i learned you could create your own levels, and then i learned programming and took classes in school. i wanted to make my own games. i loved it. emily: more importantly, perhaps, photography. you got into photography at a young age. kevin: you couldn't find me without a camera in my hand. i used to get in trouble because you know those packs -- there of film, like, 10 packs -- i would go through those packs. i loved taking photos. my family has a rich visual history now. i studied in florence in college and sat in the dark room there developing photos. that is where i learned about filtering. you could add these chemicals to the developing bath that would change the colors of the photos. i brought that along with me to instagram. emily: is that where you learned about square photos? emily: yes. yes. my photography teacher took

kevin systrom turned down a job for mark zuckerberg in college, shared a desk with jack dorsey as antter and in 2010, launched instagram as we kw it. two years later, he reunited with zuckerberg and agreed to sell instagram to facebook for $1 billion. the company had 13 employees and 30 million users. today, over half a billion people on the planet use