You know this stuff?
Yep Chadgores description in number 9 above is printable version. Hexogen in the form of Cyclonite has been around since prior to second world war. Basically C3H6N6O6 for all those playing the home game of anarchist are us.
It's right up there equal to C-4 in relative equivalency factors and brisance. Multiple sources possible as to where it came from.
I think the tampon bomb is the big threat on commercial aircraft these days........