After years spent leaning in at work, professional women may be leaning out. A new study from the advocacy group leanin.org and consultant McKinsey & Co. finds that compared to their male counterparts, fewer women are interested in big promotions. It's the first time a gap like this has happened in the survey's history, and it's something Sheryl Sandberg, former COO at Meta Platforms, and author of the book "Lean In," is passionate about. She speaks with host Emily Chang.