Form follows function, and there are only so many engineering solutions to stealth requirements. The F-117 is old, obsolete stealth technology, and everyone knows it. Which is why the “current” (or immediate past) generation(s) of stealth shaping (F-22, YF-23, PAK-FA/T-50, F-35, CALF, “J-20”) bear significant similarities to one another.
The “J-20” looks exactly like the CALF, just scaled up. The PAK-FA/T-50 looks like a hybridization of F-22, F-35, YF-23 and Su-27 engineering.
(CBS) "60 Minutes" has obtained an FBI videotape showing a Defense Department employee selling secrets to a Chinese spy for cash. The video, which has never been made public before, offers a rare glimpse into the secretive world of espionage and illustrates how China’s spying may now pose the biggest espionage threat to the U.S.China may be the number-one espionage threat now. "The Chinese are the biggest problem we have with respect to the level of effort that they’re devoting against us, versus the level of attention we are giving to them," says Michelle Van Cleave, once America’s top counter-intelligence officer who coordinated the hunt for foreign spies from 2003 to 2006.