Stalin's daughter died

Stalin's daughter Lana Peters, or in Russian Светлана Аллилуева, passed away in the state of Wisconsin on 22 November, US officials have confirmed to BBC Russian. why only today, i wonder, if this actually happened on Nov 22?

What the secrets they were trying to hide or to find, why did they need this week pause?

She graduated from Moscow University in 1949, initially working as a teacher and translator. 

Peters was married four times - three of them in Russia - and left two children behind in her homeland.

She took the name Lana Peters upon marrying architect William Wesley Peters in the US.

The couple settled in central Wisconsin and had a daughter, Olga, before divorcing in 1973.

Svetlana was the last Stalin's child.

Her brother, Jacob, died in a Nazi concentration camp during the Second World War when her father refused to exchange him for a German general, while her other brother, Vasili, died aged 40.

https://www.youtube.com/watch?v=T8wZzCcM9Js