[Eagle of Liberty]

At this point I would NOT conclude a bomb. There was one hell of an explosion though during a fire at a fertilizer plant.

I tend to agree with you, but one youtube video that I saw shows a bright light flash to the left of the main fire just before the HUGE explosion. Someone else posted a video comparing the sound of a JDAM prior to explosion and hinted that there was the same sound prior to the main explosion at the fertilizer plant.

[EBH]

That flash you see/saw...I noted it in another post as a volatile vapor flash. That's the ignition source, not a bomb. Something flashed over. I compare it to gasoline vapors flashing over to a gas can.

Under the right circumstances AA does explode. If a tank is leaking and the AA mixes with water...hydrogen peroxide forms...add heat from a fire you may attain a volatile vapor flash. I am not saying that is what happened as the plant had other chemicals onsight as well. But you have to consider what would cause two AA tanks to explode...which under normal circumstances pose no real hazard?