As early as in April 2009, the U.S. military was first put forward "six generation machine" operational concept. According to former U.S. defense secretary Robert gates forecast fake oakley sunglasses, Russia's fifth generation aircraft will be in 2015 ~ 2016 investment plan, China's annihilates-20 also in January 2011 the first flew, after a few years is also expected to Fielding forces. The future if the two aircraft realize large-scale production, the United States will to the mid 2020's to lose the air combat advantage between China and Russia. In addition, the report says, part of the Russian army has have active radar detecting the ability of the U.S. military stealth fighters wholesale oakley sunglasses, to 2020, the Russian fighter planes to F-35 and F-and the detection range will more than 46 km, and then T-50 also will realize quantities to deploy.

The continuing escalation of air defense system of Russia and China and the challenges of new aircraft that the U.S. military determined to stop the production of expensive F-22 fighter knockoff oakleys, the funds for the next few years the development of the sixth generation of aircraft. The expert points out, the fifth generation aircraft F-22 from the early concept to form the initial fighting capacity total cost of 20 years time. Historical experience make U.S. top think, "the United States needs to another 20 years developing the next generation of aircraft."

The us military believes, technical advantage deter potential is the most effective means of opponent fake oakleys, so will be F-35 stealth aircraft research and development work is not yet finished, they set out to develop the sixth generation of aircraft, to ensure the advantages in the air.