SSL added and removed here ;)
[https://www.theguardian.com/commentisfree/2017/jun/18/google-not-gchq--truly-chilling-spy-network Google, not GCHQ, is the truly chilling spy network - The Guardian, John Naughton]
How the CIA Made Google - Insurge Intelligence / Medium
Google collects Android users’ locations even when location services are disabled