Morning Rounds: What's behind America's loneliness epidemic?

A new survey released by the health services company Cigna tries to gauge the extent of loneliness in America. A little more than 20,000 adults were surveyed using a questionnaire designed to evaluate the level of loneliness or social isolation someone feels. Psychiatrist Dr. Gail Saltz joins "CBS This Morning: Saturday" to discuss which age groups are suffering the most and the physical health issues associated with loneliness.