Lyft president pushes for growth amid Uber's woes
While ride-hailing giant Uber battled chaos and controversy this year, competitor Lyft was making big gains. The company has added service to 150 U.S. markets, making it available in more than 350 areas across the country. Lyft president and co-founder John Zimmer speaks to John Blackstone about the future of ride-sharing and competition with Uber.