SGS - Secretary General Staff, a major division of DoD.
AAR - After Action Report.
RFI - Request for Information (Navy).
"Pat Tillman-style cover-up" - Tillman was killed in action, at first attributed to enemy action, later found to be friendly fire.
2IC - Second in Command.
SA - Selective Availability. Refers to GPS detection.
HVT - High Value Target.
Charlie Mike - continue mission.