As a last great act of defiance in WWII, the Germans launched the Ardennes Offensive, AKA Wacht am Rhein. One of the goals of the German effort was to split the Allies and get the US and UK to stop fighting. Then the Reich could have focused its full attention on the Eastern Front.

Could yesterday's events in Baghdad be akin to that last German effort to snatch a victory? Knowing that a sharp divide in US support for the war exists, it makes sense that the insurgents might "shoot their wad" to try to get us to bail out of the country.