Flu outbreak spreading rapidly in U.S.
The CDC says flu is widespread in more than half the country, and this year's vaccine isn't providing enough protection
Obama: Sony "made a mistake" by canceling release of "The Interview"
"That's not what America's about," president says after Sony censors itself in response to North Korean cyber attacks
How the Sony hack was traced back to North Korea
A look at some of the evidence the FBI used to tie the cyberattack against Sony to the North Korean government