1. Missouri State Fair: On September 14, 1901, the Missouri State Fair was held for the first time in Sedalia. The fair takes place annually in August and features a variety of agricultural exhibits, live entertainment, and carnival rides.

2. Harry S. Truman: In 1948, President Harry S. Truman visited Hannibal, Missouri, to deliver a speech. Truman was born in Lamar, Missouri, and served as the 33rd President of the United States from 1945 to 1953.

3. Gateway Arch Construction: On September 14, 1962, the construction of the Gateway Arch in St. Louis was completed. The iconic structure stands 630 feet (192 meters) tall and was built to commemorate the westward expansion of the United States.

4. Missouri River Floods: In 1993, the Missouri River flooded, causing widespread damage throughout the state. The flood was one of the most devastating natural disasters in Missouri's history, and it resulted in billions of dollars in damages.

5. Ferguson Protests: In 2014, protests erupted in Ferguson, Missouri, after the shooting of Michael Brown, an unarmed black teenager, by a white police officer. The protests sparked a national conversation about race and police violence, and they continue to have a significant impact on Missouri and the United States as a whole.