Everyone knows that there are tensions with Russia that have existed for years. At what point do they stop cooperating with NASA and the USG in general? Have there never been worries about what cosmonauts could do to our US astronauts in space? Or that the Russian government could do to our astronauts on ground, or in an "anomalous" instance in route to the ISS? I know cosmonauts used to carry a "survival" handgun of some sort… if they still did, and tensions were at their highest, would it not be dangerous to still fly on their rocket, go with their cosmonauts, etc.? Or are the cosmonauts joined in a common mission with the other astronauts, ignoring what the temperamental political leaders of the day are doing? I can see a camaraderie amongst astronauts, so maybe they are ignoring what our leaders are doing?
I know this is all far-fetched, but if some giant debacle happened with syria/north korea/etc, nukes start flying, would Russia send up a transmission to the cosmonauts to do something in space? Obviously we would stop going to the ISS until Commercial Crew, but how would our astronauts get down?