California voters will decide whether genetically modified foods should be marked as such. Food-makers have fought the change, a turnabout from when genetically modified foods were first introduced.
Author Janisse Ray talks about her new book "The Seed Underground," which explores why many farmers today aren't using the seeds their grandfathers used.
Polls show more than 90 percent of Americans would like a label on food made with genetically modified crops. The Food and Drug Administration has declined to require GMO labeling, but 20 states are taking matters into their own hands.