A year after outbreak, Ebola has killed hundreds in the DRC

It’s been one year since the Ebola epidemic outbreak in the Democratic Republic of Congo. So far, more than 2,400 cases have been detected and over 1,700 people have died from Ebola. Richard Preston’s new book “Crisis in the Red Zone” chronicles the epidemic and the challenges in containing it. He joins Hari Sreenivasan to discuss.