Soledad O'Brien with Sheryl Sandberg

Soledad O'Brien with Sheryl Sandberg, author of Lean In: Women, Work, and the Will to Lead. Sandberg has served as the chief operating officer of Facebook since 2008. In June 2012, she was also elected to the board of directors by the existing board members, becoming the first woman to serve on its board. Before Facebook, Sandberg was Vice President of Global Online Sales and Operations at Google. She also was involved in launching Google's philanthropic arm Google.org. Before Google, Sandberg served as chief of staff for the United States Department of the Treasury. In 2012, she was named in Time 100, an annual list of the 100 most influential people in the world assembled by Time.

"We have to let men talk about this. I hope men enter the conversation and the controversy around my book, because we need men to talk about this, too, if it's ever going to change." -- Quote from Facebook COO Sheryl Sandberg in an interview with CNN's Soledad O'Brien. (Photograph by Benjamin Lowy for Getty)