Renalto Dulbecco, 1975 Nobel Winner, Dies at 97

Italian-born scientist Renato Dulbecco died this week at the age of 97.

He received the 1975 Nobel Prize in Medicine for his works on viruses and cancer.

Anchor Lisa Mullins talks to David Baltimore, a biologist who shared the 1975 Nobel Prize with Dulbecco.

Baltimore is now at the California Institute of Technology.