What this inside look at Facebook says about Mark Zuckerberg and his business priorities

Wired magazine’s Steven Levy has reported on Facebook CEO Mark Zuckerberg for years. In his new book, "Facebook: The Inside Story," Levy draws upon that familiarity, as well as a young Zuckerberg's recently unearthed journals, for an intimate look at the social media giant -- including its reluctance to acknowledge warning signs due to a relentless focus on growth. Levy joins John Yang to discuss.