As more information has surfaced about the secretive J-20, the Defense Department spokesperson would only say the Pentagon has not been taken by surprise.
"The fact that China has developed a prototype for this program is not surprising and is consistent with the direction we have seen China's military taking over a number of years," the spokesperson said.
According to Lockheed Martin, which is still receiving hundreds of millions in taxpayer dollars to upgrade current F-22s, the J-20 "shows that other nations are seeking to develop the capability to challenge the F-22, and by extension, our capacity to attain air superiority in future conflict.
"Such emerging threats illustrate the need to continue enhancing the F-22's capabilities so that it stays ahead of evolving threats," a Lockheed Martin spokesperson said.
Both the Air Force and Lockheed Martin said the reason the $143 million-a-pop F-22s have yet to fire on any enemies -- despite U.S. involvement in air operations in Libya, Iraq and Afghanistan -- is because they're designed specifically to dominate the air against rival sophisticated air weapons like the J-20, not small, poorly armed third-world militaries and insurgent groups.
The planes' natural enemy, therefore, is one that the program's biggest critic, Defense Secretary Robert Gates, said in 2009 did not exist.
"The F-22 is clearly a capability we do need -- a niche, silver-bullet solution for one or two potential scenarios -- specifically the defeat of a highly advanced enemy fighter fleet," Defense Secretary Robert Gates said in 2009 while advocating that Congress ditch further funding for the Raptor from the budget. "[But] the F-22, to be blunt, does not make much sense anyplace else in the spectrum of conflict."
Before the decision was made to cut the F-22 program at 187 planes -- rather than the more than 600 that were originally part of the deal -- dozens of supporters in Congress and state governments sent letters to President Obama arguing that the full force of the F-22s would be needed to counter the next generations planes being developed by China and Russia. Gates dismissed the idea, saying the F-22s and newer F-35s would greatly outnumber any adversaries' forces for the next 15 years at least.