Who Knew What When about the Benghazi Attack?

What did the Obama Administration know — and when did it know — about the deadly attack on the US consulate in Benghazi, Libya?  Was it an opportunistic terrorist attack, rather than a protest against an anti-Muslim film that turned violent?  Republicans are claiming that the President and his aides were either inept or dishonest in their public statements. Adam Entous is National Security Correspondent for the Wall Street Journal.