The National Security Act that created the CIA was signed by Harry Truman the 33rd President on 7/26/1947 the 9th of Av....
Sat, 26 July 1947 = 9th of Av, 5707
ט׳ בְּאָב תש״ז
Erev Tish'a B'Av
Shabbat Chazon 1947 / שַׁבָּת חֲזוֹן 5707
Shabbat Chazon (Shabbat before Tish'a B'Av (Shabbat of Prophecy/Shabbat of Vision)) for Hebrew Year 5707 began on Friday, 25 July 1947 and ended on Saturday, 26 July 1947.
Shabbat Chazon ("Sabbath [of] vision" שבת חזון) takes its name from the Haftarah that is read on the Shabbat immediately prior to the mournful fast of Tisha B'Av, from the words of rebuke and doom coming from Isaiah in the Book of Isaiah 1:1-27. It is also referred to as the Black Sabbath due to its status as the saddest Shabbat of the year (as opposed to the White Sabbath, Shabbat Shuvah, immediately precededing Yom Kippur).