Yeah, that sounded funny but what I meant was people who can tell the difference between a 500,2,000 or a 5,000lb JDAM. This was no improvised explosive lol...
Based on what has been disclosed to date, the damage was caused by a detonation of at least 10-20 tons of explosive, and that means it was a large shipment of explosive material, and a shipment, that from all available information, was destined for Syria.
There are published reports that Syrian technicians were observed in the area, prior to the explosion, wearing chemical protective gear, so based on that, one could eliminate many of the more common types of explosives.
The only thing that fits the available evidence (that I can think of) is a shipment of ethylene oxide, the explosive used in so-called fuel-air bombs. If the explosive was a 20 ton shipment of EO, that would explain the damage seen, the ease of covert detonation, the presence of the Syrians, the chemical protective gear, and the intense secrecy surrounding the exact nature of the explosive.
An additional tidbit of information is that close scrutiny of before and after satellite photos reveals that the epicenter of the blast was most likely in a nearby warehouse facility, rather than in the railway cars.
--Boot Hill