One of the unique pieces of equipment brought to Vietnam by the 1st Cavalry Division (Airmobile) is the huge Sky Crane CH-54A helicopter, which had the ability to lift tremendous loads. (USIA/National Archives)

Here are some photos of a Sky Crane bringing in a bulldozer to clear LZ C-Rations in April 1968 at Chu Moor Mountain. (Photos courtesy of Bud Roach)