Clinton confidant Sid Blumenthal sends Clinton an email with the subject heading “Re: Afghanistan strategy” that he marks “Confidential.”
The bulk of the email contains two documents written by others for Clinton. Blumenthal comments, “One is a memo from [redacted] who served in the counter-insurgency program in Vietnam with John Paul Vann.” The name of this person will later be redacted, and the redaction code indicates this person secretly works for the DIA (Defense Intelligence Agency), NRO (National Reconnaissance Office), or NGA (National Geospatial-Intelligence Agency).
The rest of the email is not redacted except when this person’s name is mentioned. (US Department of State, 12/31/2015)
Clinton responds the next day with the comment, “Thx [Thanks] so much for sending.” (US Department of State, 12/31/2015)