Toy Story 4 premiered at the El Capitan Theatre in LA, California.
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The first wagon train arrived in California after having left Independence, Missouri, in May 1841.
The United States had its first official COVID-19 related death.
A 5.6 magnitude earthquake dubbed the 'Sierra Madre Earthquake' occurred in South California and caused around $40 million in damages.
Racer Bob Burman died after crashing his race car in Corona, California.
A chemist in Berkeley, California, US, announced that they successfully synthesized hormones that are responsible for human growth.
