Thank you for the question. It's a live one for all of us in the space community. It is humanity's precious microgravity laboratory, but it's getting older. There's a leak in the Russian module, and our Canadarm is constantly doing repairs. We've put out solar arrays to keep fuel and power going, but with the stress and orbital mechanics on it, at some point, it will have to de-orbit.
The United States had plans for commercial space stations. Those have evolved a lot, partly as companies realized how difficult and how expensive it would be. There are a few companies that will launch much smaller modules, but for the moment, the only alternative is China's small space station in low-earth orbit. It's about a third of the size of the ISS. Other countries, like India, and Europe are talking about having a low-earth-orbit space station.
We're very worried about the loss of all of that expertise if that stopped. We are very hopeful for some form of continuity to keep the ISS going as long as possible, because it's so precious. It teaches us so much. We're in active discussions with partners around the world. What can we do to make sure that there's some form of public platform for space science and for astronauts to go to? We learn so much from it and from keeping a continuous human presence going, as you mentioned, for 25 years.
We want to keep that going, but right now it's not obvious what the successors will be. It would be a big leap, if that stopped, to go from there to deep space. You'd want to keep that know-how and muscle memory going as long as possible.
It's also very beneficial to our companies. We launch science experiments from there so that they have access to space science.