Richard Nixon actually said...
It is hereby ordered, pursuant to the provisions of Section 4 of Proclamation 3044 of March 1, 1954, as amended, that on the day of interment, March 7, 1973, the flag of the United States shall be flown at half-staff on all buildings, grounds, and naval vessels of the Federal Government in the District of Columbia and throughout the United States and its Territories and possessions.
Context
Executive Order 11705—The Honorable Cleo A. Noel, Junior, George Curtis Moore
03/05/1973