Memorandum from Secretary of State James Byrnes to President Harry S. Truman

P TOP SECRET DEPARTMENT OF STATE WILL OFFICE OF THE SECRETARY WASHINGTON DECLASSIFIED November 5, 1945 E.O. 11652, Sec. 3(E) and 5(D) or (E) Dept. of State letter, Aug. 10, 1972 By NLT-NC NARS Date 6.23.75 MEMORANDUM FOR THE PRESIDENT FROM THE SECRETARY OF STATE SUBJECT: Agreement Between Great Britain and the United States on Information About Atomic Bomb The basic understanding between the United States and Great Britain on sharing the secret of the atomic bomb is incorporated in the Articles of Agreement signed by President Roosevelt and Prime Minister Churchill at Quebec on August 19, 1943. The Fifth Point of that agreement established a Combined Policy Committee composed of three American and three British members. It went on to state: " (b) There shall be complete interchange of information and ideas on all sections of the project between members, of the Policy Committee and their immediate technical advisers. "(c) In the field of scientific research and development there shall be full and effective interchange of information and ideas between those in the two countries engaged in the same sections of the field. for '(d) In the field of design, construction and operation of large-scale plants, interchange of information and ideas shall be regulated by such ad hoc arrangements as may, in each section of the field, appear to be necessary or desirable if the project is to be brought to fruition at the earliest moment. Such ad hoc arrangements shall be subject to the approval of the Policy Committee. ff It is quite clear on the face of the document that information con- cerning all scientific research and development was to be completely shared, but that information concerning manufacturing know-how was to be