If you are always at war with your neighbours you don't start handing tea and biscuits over the fence to each other and you certainly do not go on holiday together, nor have sleep overs.
However, if you're all in bed together then what happens in that bed, stays in that bed.
By that argument, Russia & China should have outed NASA decades ago. Strangely, that didn't happen.
"The Soviets and US would never
cooperate at the height of the Cold War", said the historically illiterate.
I'm the Premier of the Soviet Union. The US has just said they're going to start sending men to the moon. I tell the head of the Kosmicheskaya program, "Hey, tovarisch -- we can't let those nekulturny bastards beat us to space! Get to work."
I don't know how space travel works (or doesn't work, as it were). The head of the Kosmicheskaya, being very cunning says, "Well, sure, but it's going to cost a lot of rubles." So we give it to them and they use some of it and graft from the balance. Then they say, "We've had some technical problems. If we're going to beat the US we're going to need even more rubles. We don't want them to beat us do we?" And I say, "Hooy na ny! Ty chyo, blya? Here's some more scratch -- I want results!"
Incidentally, when the Soviets "delayed" too long and NASA beat them to the moon, the Premier pulled the plug financially. So they came up with new goals. Like SpaceLab/Mir, etc. And the game continues as they fake progress and keep the balance... Now they're all working together on the ISS -- how convenient!