17th April 1963: St. Louis Missouri, USA on Olive St, between 17th and 18th.
On the 27th of May, 1896, a tornado hit St. Louis, Missouri. Part of a larger tornado outbreak in the United States, it killed at least 255 people, but possibly more than 400.
The damage bill was over ten million dollars, which translated to around $2.9 billion a century afterwards.
The Pony Express, a mail service used in the United States to carry letters from Missouri to California, began on the 3rd of April, 1860.
The first journey left St Joseph, Missouri and arrived in San Francisco ten days later.
Only one letter from the first journey is known to still exist.