Yes. And I think the situation in Ukraine sort of exacerbates what was already a complicated supply chain. And so, I think from an Alcoa perspective, the fact is, is that we have a team that's dedicated to working on supply chains, working on procuring materials across the world and to really leveraging our ability to buy, whether it's caustic or coke or all these different materials in different parts of the world, so that we can have the best cost structure that we possibly can. So prior to the war in Ukraine, I think we were seeing that it was -- it already took a lot of creativity to make sure we were getting what we needed, when we needed it. I think the -- what we're seeing now is that, it's becoming even more complex. Now that complexity doesn't mean that we can't find the materials that we need, and I would argue that we have a very talented team that is getting very good at managing these issues. And so when we made our decision to neither buy from or sell to Russia, it took some effort to make sure that we could -- that the few materials that we do buy from Russia, we were able to replace, which we did really without any kind of issue, but it also created the drag on financials that Bill talked about, particularly because of bauxite sales that we were making into Russia. And so those things, I think the -- on the cost side, we're doing a very good job of making sure that it doesn't impact us. On the supply chain, just because of the uncertainty and the volatility, we continue to need to manage this. And again, I think it's par for the course, given some of the continued COVID disruptions we're seeing inside of China, as well as some of the other macroeconomic issues that we're seeing that we need to keep our team ready to go and ready to react as we see different things playing out. However, I think our job is to make sure that we have the materials that we needed that could drive a very stable set of operations, keep our people focused on safety, keep our people focused on operations and maintenance, et cetera. And I think our logistics team, our procurement team really has been able to keep us focused on the right things.