>>149075503 posted CIA keystone?
This may be right. Q never posts things that are made up. There will always be a citationon the web.
Here is the CIA's web page calling itself the Keystone of the Intell community.
https://www.cia.gov/kids-page/k-5th-grade/a-birds-eye-view-of-cia-history-1/cia-headquarters.html
So happy he is posting about them directly. It means they are engaged in or getting close to an operation against them directly!