643rd Pipeline Construction support Company Index Vietnam Barker, Veldon B. Conway, Thomas G. Herron, Jackson L. Ihle, Robert Keaton, Emmett C. Sr. Moran, Lonnie P. Ray, Gilbert M. "Mac" Richards, Dennis Roberts, Joseph W. Sapien, Bennie Simpson, Robert Smith, John R. Jr. Stuck, William Tate, Roger D. Valecek, Chuck F. Van Der Vliet, Kenneth T.