DC Shuts Down; Obamacare Opens Up; Public Advocate Runoff

Dr. Nirav Shah, the New York State Health Commissioner, talks about the Affordable Care Act's health insurance exchanges, which go live today. Plus: Susan Page of USA Today on the government shutdown in DC and what comes next; Paul Danahar, former Middle East bureau chief for the BBC; and Ellen Futter, president of the American Museum of Natural History, on the museum’s new teacher training program. And we take your calls on today’s Public Advocate run-off as part of an Informal, Unofficial, Thoroughly Unscientific Exit Poll.