Professional women are often encouraged to find a mentor, to be a sponsor, and to lift each other up. What is the power of women connecting with other women? Pat Mitchell is a serial ceiling smasher, groundbreaking media icon, and the co-founder of TEDWomen. She says her many mentees are part of her legacy, and that the biggest danger women pose to the status quo is working together. She shares what she's learned about effectively mentoring and coaching and the transformative impact of gathering women.