This folder contains materials collected by the office of President John F. Kennedy's secretary, Evelyn Lincoln, concerning international negotiations over the prohibition of test detonations of nuclear weapons. Materials in this folder include an agenda for a meeting with advisors, a memorandum of a recent vote in the negotiations, a press release of the summary of the United States proposed treaty for disarmament, a draft of a treaty presented to the Eighteen-Nation Committee on Disarmament, and a copy of an open letter to the President from the Citizens Committee for a Nuclear Test Ban. The folder also contains memoranda to Secretary of State Dean Rusk regarding international foreign media coverage of President Kennedy's speech at American University, a memorandum to President Kennedy from William C. Foster, Director of the U.S. Arms Control and Disarmament Agency (ACDA), regarding how recent political and technological developments may impact negotiations, memoranda to the President and from Adrian S. Fisher, Deputy Director of the ACDA, to National Security Advisor and Special Assistant to the President McGeorge Bundy on hearings of the Joint Committee on Atomic Energy on the VELA Program and nuclear test ban verification. Of note are several items with handwritten notations by the President.