Major in the United State Air Force and highest ranking officer in Cheyenne Mountain while it was a Titan missile testing facility in 1969. While smoking a cigarette, Thornbird interrogated Colonel Jack O'Neill -- who swore his dog tags were lying about his name --before handing him over to the C.I.A. The four intruders escaped along Highway 285, just outside of New Mexico. PLAYED BY - Fred Henderson FIRST APPEARED - 1969
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