Harry Truman actually said...
WHEREAS by the act of June 29, 1940, 54 Stat. 686, certain federally-owned lands lying partly in the District of Columbia and partly in the State of Virginia were placed under the control and administration of the Administrator of Civil Aeronautics, except such portion thereof as the President might, by Executive order, add to the Mount Vernon Memorial Highway, authorized by the act of May 23, 1928, 45 Stat. 721, as amended; and
05/12/1947