Chinese Stealth Tech- many think China borrowed fighter technology. I also think it would be foolish not to use proven ideas. Plus if your designs can be taken the only main advantages are strategy and training. This where the majors have the edge.
Martín Mars flying boat, seen at it's mooring on a lake on Vancouver Island. The red and white livery belongs to the air tanker/water bomber company that operates the Mars fighting forest fires each year. They are amazing aircraft to watch in action.