Many of us know about the many conflicts between the two great powers, from regional wars to the nuclear arms race to chess matches. But what about positive, cooperative moments... were there any?
There was the Apollo-Soyuz Test Project that led to a joint US-Soviet space mission in 1975. ASTP's value in terms of scientific or engineering progress was extremely questionable, but it certainly qualifies as a "positive, cooperative moment." One could argue that that first instance of working with the Russians in space helped lay the groundwork for the International Space Station.