What caused the Legionnaires’ disease outbreak in NYC?

Aired: 8/6/2015 | 0:04:45 | Clip
New York is facing the largest outbreak of Legionnaires' disease in its history: eight people have died from the respiratory illness since early July, and nearly 100 cases have been reported. Hari Sreenivasan learns more from Dr. Anne Schuchat of the Centers for Disease Control and Prevention.