The secretest secret load with extra secretness
Stuff so secret that if I told you what it was 50 million ninjas infected with HN-51 (who also happen to be freemasons) hired by the same arm of the CIA that blew up the WTC would absail from black helicopters with no lights on and they would all simultaneously give you the touch of death and then you would be dead and no-one would ever know that you existed because they would erase your identity.
That is how secret this was, and it was even more secret than all the other stuff that other people on here have "claimed" is so secret that they can't tell you about it or verify it for that matter.
As I previously posted we hauled Coca Cola "concentrate" on a DC-6 in the early 80's. I never saw so many cops (armed) and undercover etc. than any other flight Ive done including a plane full of prisoners, top secret military stuff, money, diamonds etc.
Things go better with Coke
