1. In 1876, Missouri native Wild Bill Hickok was killed in a saloon in Deadwood, South Dakota. Hickok was a famous lawman and gunslinger, known for his quick draw and sharpshooting skills.

2. On June 25, 1948, the Kansas City Monarchs became the first Negro League team to integrate. Pitcher Connie Johnson and outfielder Hank Thompson joined the Monarchs, paving the way for other black players to join previously all-white teams.

3. In 1961, President John F. Kennedy declared J.N. "Ding" Darling National Wildlife Refuge in Florida, named after the Missouri-born political cartoonist and conservationist. Darling was a Pulitzer Prize-winning artist and outspoken advocate for environmental issues.

4. The Missouri State Capitol was dedicated on June 25, 1917. The building, located in Jefferson City, is a masterpiece of Beaux Arts architecture and features murals depicting Missouri history and famous figures.

5. On June 25, 2003, famed journalist and Missouri native William F. Buckley Jr. received the Presidential Medal of Freedom from President George W. Bush. Buckley was a conservative commentator and founder of the National Review, and his advocacy for small government and individual liberty influenced generations of conservatives.