Forgot the caption...
That cement truck is one of the bombs, being photographed as it actually breaks the barrier down prior to exploding. Lucky shot? Right.
I'm open to reasonable argument. Perhaps these are fixed cameras always trained on these areas, with views widely available on the internet, and the terrorists worked with that. I could see that.
Or maybe the terrorists just turn over film to Western journalists, no questions asked.
Neither changes the view that this is primarily about propaganda to affect U.S. politics.