What is unsaid here is how the US is doing the opposite to China... the counter espionage work done to uncover just how much China knows, and also to plant false data for China to copy... the J-20 has been seen in public but there is no regular public flyoff to show this MIC stealth fighter. On the other hand, the F-35 has been test flying for years and is in low rate intro to the US Marines and Airforce... News of the EO-DAS being compromised may be due to BAE systems leaks and not LM... but I doubt the whole EO system was lost to the Chinks....