I don't think it's a matter of reverse engineering. What I read indicated Israel paid the vendor for access to the source code, which makes a little more sense.

I don't think it's a matter of reverse engineering. What I read indicated Israel paid the vendor for access to the source code, which makes a little more sense. (the reason given was kind of interesting, involving a prediction that within a decade the stealth technology of fifth-gen fighters might very well be compromised by improved sensor and signal processing technology, and Israel wanted to stay on the pointy end of that)