Honestly this espionage thing is overrated. Plenty of employees in the US take their knowledge to (domestic) competitors and find it quite hard to just clone a

Honestly this espionage thing is overrated. Plenty of employees in the US take their knowledge to (domestic) competitors and find it quite hard to just clone a business. The Russians and US were stealing each other's plans during the space race but this often led to misunderstood and suboptimal designs. See Buran https://wikipedia.org/wiki/Buran_(spacecraft) https://wikipedia.org/wiki/Buran_(spacecraft)