The Texas Chain Saw Massacre horror film premiered in cinemas in Los Angeles, California.
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The first wagon train arrived in California after having left Independence, Missouri, in May 1841.
Charles Manson is sentenced to death in the gas chamber.
The third-strongest recorded earthquake in US history happened in Southern California.
The first killer whale calf was born in captivity at Marineland in Los Angeles, California.
Naturalists Chris Atkins and Michael Taylor discovered the world's tallest tree in Redwood National Park, California.
