That's a difficult question. The United States is our ally, of course, and they do good things—good research, good development. I don't think we can pretend they're not there. Yes, we should collaborate with them, not that we had a choice.
Europe, as a whole, has a concerted effort to develop both quantum cryptography and a quantum Internet. It's a very concerted effort. It's going really well over there, and we would only benefit from collaborating with them.
Japan is also doing really good work, so it's take your pick. There's no single answer.