The temperature on April 22, 1957 was between 4.9 °C and 17.1 °C and averaged 11.5 °C. There was 8.7 hours of sunshine (61%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
January 31 » Eight people (5 total crew from 2 aircraft and 3 on the ground) in Pacoima, California are killed following the mid-air collision between a Douglas DC-7 airliner and a Northrop F-89 Scorpion fighter jet.
February 18 » Kenyan rebel leader Dedan Kimathi is executed by the British colonial government.
May 3 » Walter O'Malley, the owner of the Brooklyn Dodgers, agrees to move the team from Brooklyn to Los Angeles.
September 29 » The Kyshtym disaster is the third-worst nuclear accident ever recorded.
October 14 » At least 81 people are killed in the most devastating flood in the history of the Spanish city of Valencia.
October 29 » Israel's prime minister David Ben-Gurion and five of his ministers are injured when Moshe Dwek throws a grenade into Israel's Knesset.
When copying data from this family tree, please include a reference to the origin: Nienke Oudbier, "Descendants van de Vlag1", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-oudbier/I3329.php : accessed February 24, 2026), "Jan Mulder (1915-1957)".
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