> Trying to reverse engineer software (the policy was that no one gets access to the original source code for the F-35[0], at least back in 2009) is probably a no-go under those agreements.

the UK made access to the source code a condition of purchase, and the technology transfer agreement was signed

in a hypothetical scenario where the US federal government falls under the direct control of a russian asset, I imagine this would end up in our allies hands reasonably quickly