ISIS takes credit in downing Russian airliner

[Magda Hassan]

There is an agreement [don't know if by treaty] that major explosive manufacturers need to put certain trace chemical labels in their products that allows for a determination that it was their product used in any explosion....However, many of the top makers of explosives [especially the very 'sexy' ones] also produce unlabeled explosive for use by intelligence and military operations - so they can not be traced - but this is not admitted to - in fact denied. Add to that, it is possible to create batches of explosive that have the trace chemical 'labels' of a different company than the one that created it [i.e. create a false-flag batch of explosive]....

Yes, there is an international treaty. But even before that manufacturers would often put in tagging identifiers. But there is plenty of old stock with out and if the manufacturers are doing their own thing with secret batches it does make it quite a tricky exercise to work out who made what.