NCC President in War Zone: Bishop Reuben H. Mueller, president of the National Council of Churches, conducts services for officers and men of the USS Krishna, Naval supply ship off the coast of South Vietnam. Bishop Mueller of Indianapolis, head of the Evangelical United Brethren Church, spent a week in the South Vietnam war zone during the Easter season. He was accompanied on the annual visit to servicemen overseas -- for the first time this year to a war area-- by Dr. Fred S. Buschmeyer of New York, secretary of the United Church of Christ, and Dr. J. Oscar Lee, secretary for program of the NCC's Division of Christian Life and Mission.