Americans continue to grapple with historic weather system

Most of the nation is still locked in the deep freeze as a polar vortex that swept south is holding sway, claiming at least 30 lives and keeping the power off for more than 3 million people. Stephanie Sy reports, and speaks to Mayor Harry LaRosiliere of Plano, Texas and Oklahoma City, Oklahoma Mayor David Holt about how the weather is impacting their cities.