Originally posted by Simon666

Originally posted by Zaphod58
If the Russians had a Mach 6+ spy plane, they sould haev had a much better chance of seeing what some of our black projects were, by flying overhead in a high speed dash and catching them unaware until it was too late.

No they wouldn't, since that would cause a serious diplomatic incident with the US and vice versa the same applies. Violating sovereign countries airspace is a cause for war. I doubt any US planes have overflown Russia some time after Gary Powers was shot down.