Thanks Publius!
I went to YouTube and listened.
One of the posters posted this comment which I didn’t know:
“He played this at the beginning of every appearance in the US out of respect.”
Wish he was still around.
As Rachmaninoff was dying of cancer in 1943 at age 69, he finally became an American citizen, which was his way of giving the finger to Stalin one last time. He’s buried not too far from Ayn Rand, another Russian who fled the Bolsheviks.