As the US government prepares to hand out more than 250 million free doses of vaccine for the H1N1 virus, health officials are confronting fear and misinformation. What is the H1N1, or swine flu, as it's commonly known? Who should take a vaccine against it? By taking early precautions to combat the flu, has the government caused more anxiety than necessary? Also, Also, terror suspect, Najibullah Zazi, enters a plea, and startling news about the placebo effect.  Sara Terry guest hosts.