Bill also points to this piece of history from another source:
In the past year (2009) alone, Lockheed Martin found “six to eight companies” among its subcontractors “had been totally compromised – emails, their networks, everything” according to Lockheed Martin chief information security officer Anne Mullins.
He sees the F-35 if the short-take-off-vertical-landing (STOVL)was not a requirement. STOVL design requirements have caused numerous problems with all 3 F-35 variants.
It will be interesting to see what mission sets China expects out of the J-21. I still think this design is complementary to the J-20 for achieving regional air supremacy.
It is obvious that the compromised U.S. data has born fruit. If it were me designing this thing, I would have built the center section around the F-22 main weapon's bay. It is a better bay for performance aircraft.
I suppose the coming months will see how far these assumptions go.

