That's right. Romania does fly former Russian aircraft as their front-line fighter.
Undoubtedly, if you're on the borders of Russia, our new NATO allies—Romania, Hungary, Poland, the Baltic states—have very long memories of history. So there are traditional existential concerns within those countries. As you might expect at NATO tables, they're rightly seeing this as their central concern and, certainly, the alliance accepts this, that all NATO members are equal and that we take that threat—certainly that's their view of it—very seriously.