Working on a dig relating to the GOOG/Keyhole mention that was connected to the Keystone digs. Still working on it, but wanted to share connections I've already found.

GOOG/Keyhole

CIA

NSA

National Geospatial Satellite

en.m.wikipedia.org/wiki/Google_Earth#History

This article also contains some great info that I'm currently working with

https://pando.com/2015/07/01/cia-foia-google-keyhole/