Mind Reading (Part 2 of 2): The rise of mental surveillance

Our lives are increasingly under surveillance. Is the mental wilderness between your ears your last truly private space? Scientists are uncovering new ways to fish for your thoughts, and to decipher the brain's neural code behind your thinking. The applications are potentially revolutionary -- from probing the mental capacity of patients trapped in coma, to lie detection or brain-machine interfaces for controlling computers with thoughts alone. But the ethical questions surrounding this fledgling science are profound. What cost for personal privacy as the cognitive borders of our minds are penetrated?