When you're dealing with the assassination of the world's most-wanted criminal, you might want to actually know what you're talking about. In the space of 36 hours, the official story on what happened to Osama bin Laden has gone from "he went down guns blazing and taking hostages" to "basically we shot him."

Earlier today, on ABC's This Week, Defense Secretary Robert Gates defended the troops shown killing Iraqis in a video aired by leaks site Wikileaks. They responded to his rebuttal simply, in a tweet: "Robert Gates is a liar."