1. Missouri State Penitentiary opened: On April 28, 1836, the Missouri State Penitentiary in Jefferson City opened its doors to the first batch of prisoners. The prison, originally designed to house 600 inmates, was in use until 2004 and was notorious for poor living conditions, riots, and executions.

2. St. Louis World's Fair: The Louisiana Purchase Exposition, also known as the St. Louis World's Fair, officially opened on April 28, 1904. The fair, which lasted for seven months, was held to commemorate the centennial of the Louisiana Purchase and attracted over 19 million visitors.

3. NBA championship for St. Louis Hawks: On April 28, 1958, the St. Louis Hawks won the NBA championship by defeating the Boston Celtics in Game 6 of the Finals. The Hawks, led by Bob Pettit, won their first and only championship in franchise history.

4. Truman wins Pulitzer Prize: On April 28, 1946, former Missouri Senator and President Harry S. Truman was awarded the Pulitzer Prize for his memoir, "Year of Decision." The book chronicled Truman's first year in the White House and his decision to drop atomic bombs on Japan.

5. Tuskegee Airmen monument: On April 28, 2018, a monument was unveiled in Jefferson City to honor the legacy of the Tuskegee Airmen, a group of African American pilots who served in World War II. The monument, which includes a 9-foot bronze statue, pays tribute to the bravery and sacrifice of the Tuskegee Airmen and their contributions to the desegregation of the military.