I don't think we should feel threatened by this J-20, it is likely a prototype that needs years of R.& D. Look at the F-35 that should have been in service 5 years ago. I wouldn't feel threatened by the JSF program. Now in 10-15 years when the J-20 or its final versions are ready for production, and China decides to sell them, then I get worried. If Iran, and or N. Korea have't used their Nuke's yet (these 2 Axis's are working very hard together sharing info do the research look it up), which should be ready about the same time this plane is ready for production. We shouldn't feel threatened China needs the U.S.' economy as crappy as it is. China holds a lot of our debt, w/out us they are up sh!ts creek w/out a paddle. Thank the Govt. for letting this happen 25-30 years ago. If we were to try and start to manufacture like we were back then we would need 10 years of hard work and we wouldn't even come close to the amount that China produces now let alone 10 years from now. Some of China's companies that ship goods in cargo boxes don't want them shipped back they just use new ones. I guess what I am saying don't feel threatened by the Chinese people, they are working hard like us with less reward. It's who China considers allies that I am truly worried about.