While you are correct that we don't have any actual information to show that in this thread, it would seem plausible (if you compare the amount of money that th

While you are correct that we don't have any actual information to show that in this thread, it would seem plausible (if you compare the amount of money that the U.S. spends on research and the air force vs. e.g. Iran) that America's doing most of the heavy lifting here.