Export controls are there to prevent killing machines getting in the hands of a countries enemies (or potential enemies in the future)
In practice that isn't, umm, practical. Consider the Falklands war - Argentina had Type 42 destroyers sold to them by Britain, and Exocet missiles sold by fellow NATO member France.
Those are more the exceptions that prove the rule, though. I don't see any other countries with B-2s or other major US weapons systems, unless the US intended it.
In practice that isn't, umm, practical. Consider the Falklands war - Argentina had Type 42 destroyers sold to them by Britain, and Exocet missiles sold by fellow NATO member France.