Not everything was in the papers. At least not in American papers. Zbignev admitted that only in 1998 in his book or something.
Russian papers in 1990s after USSR dissolution revealed that Soviets feared that US would place nukes in Afghanistan like they did earlier in Turkey. That was the real reason Soviets invaded Afghanistan.
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So info couldn't have been in the papers because Brezezinski didn't admit til '99?
Funny, I distinctly remember reading it at the time. It was no secret. That B didn't cop to it is irrelevant.