Re: Then after...?
The explosive might have been PLX
Yes, or it might have been anything from nitroglycerine to exploding unicorn farts. The fact it needed triggering by a separate time bomb, concealed in a transistor radio, suggests it was simply a liquid explosive, relatively easy to obtain and handle, rather than a binary liquid explosive, which requires careful handling and pretty precise mixing to cause an explosion.
It's not just "O Noes! The blue is mixing with the red" <<BOOM>>