When David Petraeus told Congress on Friday that he knew almost from the get-go that Ambassador Chris Stevens was killed in a terror attack in Libya, the former CIA director was contradicting information put out by two prominent Obama appointees.

The first is United Nations Ambassador Susan Rice. The Sunday after the attack, Ms. Rice took to the talk shows to blame everything, falsely, on an Islamic mob outraged by a blasphemous YouTube video. Mr. Petraeus says the CIA's original talking points mentioned...