Mr. and Mrs. Reginald W. Haist, 1145 Valleyway, Niagara Falls, received a cable Tuesday advising that their only son, Flt. Sgt. John Clyde Haist, 20, was killed on active service March 29 and will be buried in England. Haist enlisted in the R.C.A.F. in 1940 and went overseas last October. He was a pilot and had participated in numerous raids over enemy territory. Besides his father, who is a veteran of the last war, and his mother, he leaves one sister, Jean at home. Reginald Haist, the father, is an old Grimsby boy and enlisted from here in 1914. He was a son of the late W.I. and Mrs. Haist.