Must-see morning clip: Sheryl Sandberg on why more women aren’t at the top

Facebook COO Sheryl Sandberg argues that men outnumber women in leadership positions because women worry more than men do about external issues–like their reputation and balancing a family life. “When it comes to ambition to lead–to be the leader of whatever you’re doing,” Sandberg says on “60 Minutes,” “men and boys outnumber girls and women.”