The temperature on March 11, 1961 was between 5.9 °C and 10.9 °C and averaged 8.3 °C. The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
January 17 » U.S. President Dwight D. Eisenhower delivers a televised farewell address to the nation three days before leaving office, in which he warns against the accumulation of power by the "military–industrial complex" as well as the dangers of massive spending, especially deficit spending.
January 23 » The Portuguese luxury cruise ship Santa Maria is hijacked by opponents of the Estado Novo regime with the intention of waging war until dictator António de Oliveira Salazar is overthrown.
April 23 » Algiers putsch by French generals.
July 21 » Mercury program: Mercury-Redstone 4 Mission: Gus Grissom piloting Liberty Bell 7 becomes the second American to go into space (in a suborbital mission).
August 21 » American country music singer Patsy Cline returns to record producer Owen Bradley's studio in Nashville, Tennessee to record her vocals to Willie Nelson's "Crazy", which would become her signature song.
October 30 » The Soviet Union detonates the Tsar Bomba, the most powerful explosive device ever detonated.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P25078.php : accessed February 21, 2026), "Katherine Beekman Hoppin (1874-1961)".
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