View of San Francisco from the heavens, via @jack. We have his story—on how a tweet’s 140 characters can change the world—and the trip that changed his life:

“Baghdad in 2009 opened my eyes to the power of technology to change lives. You’d see little kids under trees playing with their phones, communicating with one another. I met war widows who used Twitter through SMS to speak freely about their lives. That country is changing day by day, and Twitter is enabling them to participate in the global conversation.” 

Behind the scenes video footage of Jack Dorsey with his Twitter co-founders here.