Two Russian cosmonauts and an American astronaut reached the International Space Station this week for a 6-month mission.
What's it like to live in relatively close quarters as their two nations are locked in a dispute over Russia's annexation of Crimea from Ukraine?
NASA astronauts have said they talk about politics "in a friendly way" on the space station.
But space policy expert Howard McCurdy describes life on board the space station as "like a divorced couple trying to live in the same house."
- Howard McCurdy, an expert on space policy and professor at American University.
This segment aired on March 28, 2014.