JimO wrote:

Russia's Secret: Did Space Station Nearly Die The Day It Was Born?

From the article:
"The module was the FGB, Russian for “Functional Cargo Block,”
code-named “Zarya.” Based on a design flown before (including one
spectacular Russian space station failure in May 1987 that the Russians
had not told NASA about), the hardware was part of the military side of
the Russian program and had special high-security radio links with Earth."
Does this refer to Polyus?

Pat