On this day in 1924, the first iodized salt in the U.S. went on sale at Michigan grocery stores. 

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On this day in 1937, the first animated electric sign was installed on Broadway in New York City. 

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On this day in 1953, U.S. President Dwight D. Eisenhower signed an executive order that banned gay people from working for the federal government. 

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On this day in 1886, legendary blues singer Ma Rainey was born in Columbus, Georgia. 

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On this day in 1792, a French bandit became the first person to be killed by guillotine. 

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On this day in 1960, during a peaceful demonstration at Biloxi Beach, a group of Black activists were attacked by white segregationists. 

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On this day in 1989, Nintendo released the original Game Boy in Japan.

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Please enjoy these April 20th flashbacks from the TDIHC vault, and we will see you tomorrow for a brand new episode!

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On this day in 1943, Swiss chemist Albert Hofmann discovered the psychic effects of LSD while bike riding home from his lab. 

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On this day in 1930, BBC Radio announced there was no news to report and played 15 minutes of piano music instead.

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