1. In 1820, Missouri was officially recognized as a state after a long and controversial struggle. The admission of Missouri as a slave state sparked heated debate and controversy in Congress, eventually resulting in the Missouri Compromise of 1820.

2. In 1950, the first tornado warning system was put into place in Kansas City, Missouri. The system consisted of a network of sirens that would sound in the event of a tornado warning, providing residents with vital warning and notification.

3. In 1973, the Missouri State Capitol building was placed on the National Register of Historic Places. The building, located in Jefferson City, was completed in 1917 and is known for its beautiful architecture and historical significance.

4. In 1991, a devastating flood hit the city of St. Louis, causing widespread damage and displacing thousands of residents. The flood was caused by heavy rainfall and rising water levels in the Mississippi River, and it remains one of the most significant natural disasters in Missouri history.

5. In 2018, the first medical marijuana dispensaries opened in Missouri, marking a significant shift in the state's approach to marijuana use and regulation. Missouri voters approved a measure allowing medical marijuana in 2018, and dispensaries began selling medical marijuana products to patients with qualifying medical conditions in late 2020.