Re Mk1's post -
When I hear people say that the JSF program must be all good, because the professionals who have the security clearances all say that it's good, which clearly trumps the opinions of armchair experts (dunno who they are, I never type in my armchair)...
I remind them that, exactly 100 years ago, the smartest military staff in the world, commanding the world's best trained and equipped army and with access to unique and advanced technology, was compiling the latest version of a plan that they firmly believed would gain them dominance of continental Europe in a matter of months.