Twitter's stock price had risen above 70 points -- almost triple what it was first offered at two months ago
Dorsey, also CEO of Square, posted the first tweet in 2006
Twitter's Jack Dorsey also beats Facebook's Mark Zuckerberg on Fortune Magazine's yearly rankings
Murdochs fall, government officials gain and American new media entrepreneurs dominate the top
Dorsey, who had been CEO until 2008, assumes product chief role
Seemingly overnight, Twitter became the quickest, most visceral form of reporting for some major stories. Backlash time.