Some great footage sent to me by Chris Jensen, who was a photographer with the 221st Signal Company. I believe this was footage of C-Troop, Mr. Jensen states:
I was a motion-picture photographer with the 221st Signal Comapny. In August 1970 I went with some guys from an aero-rifle platoon. I recently got my film from the National Archives and did a rough edit before putting it on YouTube. I thought your folks might be interested.