Player Embed Code: Download Embed Share SERE Refresher Training Colorado National Guard June 8, 2014 | 2:30 Colorado Air National Guard pilots go through a one day SERE refresher course and Combat Skills Training in southern Colorado. Tech. Sgt. Nathan Martinez, USAF, instructs and gives hands on demonstrations. B-roll with nat sound and interviews. Produced by Tech. Sgt. Kevin Coulter. Includes soundbites from Tech. Sgt. Nathan Martinez, USAF, 302nd OSS, Peterson Air Force Base, and Capt. Frank Prokop, 120th Fighter Squadron, COANG.