I know something that the US is expert in producing in huge quantities; but I am sure they would'nt like to share this kind of technology with other rivals. Can you guess?
Weapons of mass destruction, nuclear technology (I dont know where the raw materials come from) and stealth aircrafts. :D Yeah, the Nighthawks! Not many countries have such hi-tech toys. Frisbees, Wobblin Goblins, otherwise known as F117A! They have retired this model last year.