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Top A. -Bomb P Donald MacLean, the missing British diplomat, was a member fof the committee that controlled the wartime exchange between this country and its partners in the development of ‘the atomic bomb, a State Department spokesman said yesterday. MacLean and Guy Burgess, a fellow: British Foreign Office member, mysteriously disap- peared from London May 25. They since have been the object of a broad international man- hunt, accompanied by sugges- tions both may have slipped be- hind the Iron Curtain with vital secrets. ~ |i The State Department official here would confirm only that MacLean was a member of the ' combined policy committee that dealt with top-level international relations on the A-bomb project. ;. An. article in United States News’ and World Report said MacLean knew “how many tomic bombs the West had, hat were the uranium re- jources, how many bombs could made with existing resources nd materials.” : > , PL, Oe issing British Official Knew lanning Secrets ‘By The Associsted Press The news magazine said Mac- Lean did not know the scientific details, because the policy com- mittee did not deal with them, but did know “the degree of, three countries — Great Britain, Canada, and the United States.” MacLean came to Washington the magazine said, important It said that when the top inter- national policy committee on the atomic project was set up, he became secretary ot the British section. It added that another job was to arrange for “swapping facill- ties, exchanging scientists among the countries, for getting uran- ium and other, materials, for dividing secrets." “And it arranged for the ad- mission of Dr. Klaus Fuchs into the United States,” the article said. “There he got the atomic information that was to make him the super-spy of all time.” Fuchs now is in a British prisen, —e atomic cooperation among the’ as First Secretary of the British” Embassy in 1944. In-that post, , secrets passed through his hands, UPorr zy - By LETTER “/ PER FOIA REQUEST oes JUN 22 1976 \ Lee «ASB, NoT (a 42 SEP 261951 ee eee CB. wie More Dof Plavin, Nichols Rosen. Tracy, Harbo. Alden Belmont, t Laughlin. Mohr. Tele. Room | | Page Times-Herald _ Wash. Post _{ agh. News _ Wash. Stare. N.Y. Mirror N. ¥. Compass___