According to Twitter founder Jack Dorsey, the social media platform came of age in 2009 when US Airways Flight 1549 ditched in the Hudson.
Twitter has been called the pulse of the planet -- home to Lady Gaga, LeBron, foreign revolutionaries, journalists, tech geeks and the Pope himself. CNBC tells the story behind the rise of Twitter, the social media giant whose 200 million active users have made it a fixture at home and around the world.