Many of the overhyped American defense innovations have failed in actual use scenario. One perfect example is that of the Lockheed Martin F-35 Lightning II fighter jet. The Americans spent around $1.7 trillion on the development of this jet, and in the end they got a product that is much inferior to the Russian Sukhoi Su-57 (which was developed at a cost of around $60 billion). And the most comic part is that a part of the cost was borne by the European allies such as France and Germany. The unit cost is also much lower. Su-57 costs $35 per piece, while F-35 costs $110 million.