TFZ is an exploration into various mysteries & peculiarities through the sands of time & space...
https://www.coasttocoastam.com/guest/king-professor-slim-96561/
So much knowledge and skill was involved. https://en.wikipedia.org/wiki/D._B._Cooper#Knowledge_and_planning
https://thedigitallabyrinth.blogspot.com/search?q=D.B.+Cooper