On May 27 and 31 and June 1 and 2, Secretary of State Christian A. Herter, Director of Central Intelligence Allen Dulles, Hugh L. Dryden, Deputy Director of the National Aeronautics and Space Administration, Under Secretary of State Dillon, Charles E. Bohlen, Special Assistant to the Secretary of State, and Secretary of Defense Thomas S. Gates, Jr., testified in executive session before the Senate Foreign Relations Committee on events relating to the summit conference in Paris in May. For the hearings of May 27 and June 1 and 2, without testimony the executive branch believed might jeopardize the national security of the United States, see Events Incident to the Summit Conference: Hearings Before the Committee on Foreign Relations, United States Senate, 86th Congress, 2d Session (Washington: U.S. Government Printing Office, 1960). For text of the full hearings, including Allen Dulles' statement on the U - 2 and his responses to questions from committee members on May 31, see Executive Sessions of the Senate Foreign Relations Committee (Historical Series), 1960, volume XII (Washington: U.S. Government Printing Office, 1982), pages 279 - 359. For the report of the committee on the hearings, see Events Relating to the Summit Conference: Report of the Committee on Foreign Relations, United States Senate, Together With Individual Views, Senate Report No. 1761, 86th Congress, 2d Session (Washington: U.S. Government Printing Office, 1960).