Memorandum from Wallace D. Henderson, Director, Indications and Warning, Office of the Assistant Secretary of Defense for Intelligence, to [Deputy Secretary of Defense Robert] Ellsworth, [Deputy Assistant Secretary of Defense for Programs and Resources Thomas] Latimer, and [Deputy Assistant Secretary of Defense for Intelligence and Warning Morton] Goulder, "Minuteman Launch on Warning Demonstration," 30 January 1976, with cover memorandum, Top Secret, Excised copy