Mark Zuckerberg, founder and CEO of Facebook at a press conference in 2010. (Photo: Robert Scoble/Wikipedia)

Everyone is buzzing about Facebook on Wednesday, thanks to its planned $5 billion initial public offering. A lot of investors will soon be scrambling to pick up some shares. The social media giant has hundreds of millions of users around the globe. But for our Geo Quiz we are looking for Facebook's fastest growing markets. In other words, we want to know which countries are experiencing an explosive growth of Facebook users? Brazil and India are the answers to the Geo Quiz. Anchor Marco Werman talks to Zeynep Tufekci, professor at the University of North Carolina. Tufekci teaches the social impacts of technology at the University.

Related Stories