 And so Russia had said that it was considering doing something with missiles again. But basically, they've used that as a threat. Whether they do this or not, it's not clear. But it's one thing that they have continued to hold over the U.S.'s head, the fact that they are a nuclear nation. And because the U.S. is helping Ukraine, they may decide to use nuclear weapons. J.J., thanks. You're welcome. WTOP National Security Correspondent J.J. Green.