This is not very well known in the US, although the Russians were sore about it for quite a while. This was back in early 90s when the US was universally percei

This is not very well known in the US, although the Russians were sore about it for quite a while. This was back in early 90s when the US was universally perceived as a "friend" by freshly ex-Soviet people for the first time in their lives, and such military cooperation was actually possible. Turns out this somewhat naive trust was misguided.