The reason why the US does not want to sell the F-22 and F-23 with the software source codes.The jets can switch between air-to-ground and air-to-air missions in mid-flight, thanks to some eight million lines of code.The United States will provide a way for countries to upgrade the software as necessary without revealing the source code.
Withholding the source code also protects hardware vendors from parties that clone the hardware system. For example, hardware vendors selling specific systems to China frequently provide only object code and not source code, which ensures that software must be upgraded or replaced regularly.
F-35 with an off-switch controlled by Obama and subject to disclosure by the Jew-haters in the State Department to China, Syria, whoever.
No thanks.