Discover Our Collections Subject > Transportation (remove) Type > Text (remove) Specific Item Type > Memorandum (remove) Date > 1966-04-01 (remove) Limit your search Tag Digital item (1) Contributor Johnson, Lyndon B. (Lyndon Baines), 1908-1973 (1) Date 1966-04-01 (1) Subject Transportation (1) Type Text (1) Collection National Security Files (1) Series National Security Action Memorandums (1) Specific Item Type Memorandum (1) Time Period Presidential (Nov. 22, 1963-Jan. 20, 1969) (1) 1 results Memorandum # 344, Assignment of Highest National Priority to the Civil Supersonic Development Program, 4/1/1966 (Item)