Facebook admits obvious, Claims miraculous knowledge of States G-Men

[grarpamp@gmail.com (grarpamp)]

Starting today, we will notify you if we believe your account has been
targeted or compromised by an attacker suspected of working on behalf
of a nation-state. ...
To protect the integrity of our methods and processes, we often won't
be able to explain how we attribute certain attacks to suspected
attackers.

https://www.facebook.com/notes/facebook-security/notifications-for-targeted-attacks/10153092994615766