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TARHE: A Sikorsky CH-54B Tarhe, better known as the Skycrane, brings another M114 155 mm howitzer to a 3rd Marine Division artillery position near the Laotian border in January 1969, The artillery supported some 5,000 U.S. and South Vietnamese troops in an offensive near the abandoned Marine fortress at Khe Sanh in northern South Vietnam. / Getty Images