As a mark of respect to the memory of the Honorable Hugo L. Black, former Associate Justice of the United States, it is hereby ordered, pursuant to the provisions of Section 4 of Proclamation 3044 of March 1, 1954, as amended, that until interment 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. I also direct that the flag shall be flown at half-staff for the same length of time at all United States embassies, legations, consular offices, and other facilities abroad, including all military facilities and naval vessels and stations.
RICHARD NIXON
The White House
September 25, 1971
NOTE: Executive Order 11620 was not issued in the form of a White House press release.
Richard Nixon, Executive Order 11620—The Honorable Hugo L. Black Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/307164