Larry Johnson explains why the destruction of the Sarafiya bridge in Baghdad is a very significant bad sign:
The destruction of the bridge is a significant technical accomplishment for the group that planned and carried out the attack. I do not buy the explanation that this was a mere "truck" bomb. I am not familiar with any truck bomb in the world that takes out two ends of a bridge simultaneously. In fact, if it was the result of a truck bomb you would expect a hole in the pavement,i.e. a crater. While it is difficult to tell from the picture it sure looks like the bridge was sheared at two separate points and an entire section of the bridge fell intact into the water. That is not what one would expect from a blast from a truck bomb.Again, h/t Ant Loewenstein.