Is this picture real? I don't get why there isn't any evidence of bits of cables still hanging from at least one of the towers or any other kind of wreckage. It looks more like someone has photoshopped all the cables out of of an old photo.
You can see that the top of each tower has come off, so none of them are standing as tall as they were. Still, sure, it looks like a serene picture apart from the dust in the air.
You're right but, it looks like the smoke/dust comes from the anchor points of the cables, so the ground part gave way and all cables were collapsed cleanly.