I appreciate the opportunity to answer that question.
As I said, this is actually a joint project, meaning that the parts that go into each aircraft come from all over the world. The project could not be halted by a single country. Regarding software, all of the various governments contribute to developing it. So if there were a problem and someone wanted to shut the aircraft down—people are always talking about a kill switch, for example—it would not be impossible, I admit, but it would be difficult. That would mean that no one in the aircraft could communicate with the others, which is impossible, of course. There is no such kill switch at the Pentagon.