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TIL during the tornado outbreak of 1974, forecasters in Indiana, frustrated because they could not keep up with all of the simultaneous tornado activity, put the entire state under a blanket tornado warning. This was the only time in U.S. history that an entire state was under a tornado warning.

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LnBm TIL that no point within the state of Michigan is more than 6 miles from a lake
6906Z TIL in 2005 a typo nearly bankrupted one of Japan’s largest investment banks, Mizuho Securities. A broker mistakenly sold 610,000 shares at 1 yen each instead of 1 share at 610,000 yen. Attempts to cancel the trade failed. Mizuho lost over $225 million in minutes.
6EOZZ TIL that the unknown soldier for Vietnam was identified and later recovered and returned to his family after 26 years.
N7R7Q TIL under the Geneva conventions Military surgeons are required to treat wounded enemy soldiers equal to allied troops
MEnm TIL that in 1881, Navy engineers invented the first ever air conditioner with a lot of ice and a series of fans in order to cool President Garfield’s bedroom during the summer months after he was confined to his bed after being shot.