Smoke and dirt fly out of a Viet Cong tunnel entrance after combat engineers from the 173rd Engineers Company, 173rd Airborne Brigade, set off T.N.T. to collapse a large tunnel complex dug by the Viet Cong in Thanh Dien Forest of the Iron Triangle (north of Saigon); Operation Cedar Falls, 21 January 1967. Photography: Sergeant Edward Kane.

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Reference : A0084