1. On April 20, 1904, the St. Louis World's Fair officially opened to the public. The event was attended by over 20 million people and showcased the latest technologies and cultural exhibits from around the world.

2. In 1819, the Missouri Legislature passed a bill authorizing the construction of the state's first mental institution, which was later named the Fulton State Hospital. The hospital still stands today and is one of the oldest mental health facilities in the United States.

3. On April 20, 1871, Jesse James and his gang robbed their first bank in Gallatin, Missouri. The robbery marked the beginning of a string of bank and train robberies that made James one of the most notorious outlaws of the Wild West.

4. Missouri-born comedian and actor Redd Foxx was born on April 20, 1922. Foxx is best known for his role as Fred Sanford on the hit television series "Sanford and Son" and for his stand-up comedy routines.

5. The Missouri State Capitol building was dedicated on April 20, 1917. The building, which stands in Jefferson City, Missouri, serves as the seat of government for the state of Missouri, and its majestic dome is a prominent feature of the city's skyline.