[WackySam]

You have some non-Soviet documentation to support that?

Not in writing. But the man who told me was a retired AF Col. with a great deal of knowledge on the subject.

[X-spurt]

Scuttlebutt likely not limited to enlisted folks. Not saying its false info from your friend.

I tend to be very skeptical regarding Cold War hi-tech claims relating to USSR. They were definitely masters of deception, not necessarily advanced technology. Some of the deception was fostered by our Mil to enable increasing budgets.