Son Goku writes:
Are there superweapons?
I'm sure there are. The question really ought to be are these superweapons actually practical?
Are they plausible in the first place?
They are very plausible in the first place.
Is there secret scientific knowledge?
I'm sure the military has secret technologies up their sleeves. That said, don't hold your breath for photon torpedos and warp drives anytime soon.
What is the truth in Tesla conspiracies?
While competing with Edison, Tesla had this idea that he could transmit "free" energy through the air to people. Some conspiracy theorists have even "theorized" that it was Tesla's experiment that caused the multi-megaton explosion in Tunguska in Siberia.