Known facts: KGB/FSB tried to blow up a building full of civilians in Ryazan!
ROFLOL! Here is a picture of the detonator found at the scene.
Detonator at Ryazan. Hexogen was supposedly the explosive. Now there is a major reason no explosion could not happen. However, I am not going to say any more. Go learn what you are discussing for a change.
Correction, Should read, "There is a reason an explosion could not happen with Hexogen and the detonator shown in the picture." Why?