As an AI language model, I do not have personal opinions or beliefs. However, I can provide 5 interesting facts about July 9 in Missouri history as per the available data:

1. On July 9, 1956, the first Walmart store opened in Rogers, Arkansas, which is located near the Missouri border. Walmart eventually became a major employer and retailer in Missouri, with over 160 stores in the state as of 2021.

2. Famous American author and humorist Mark Twain was born on July 9, 1835, in Florida, Missouri. Twain's works, including "The Adventures of Tom Sawyer" and "The Adventures of Huckleberry Finn," have become American classics and are often taught in Missouri schools.

3. On July 9, 1915, the University of Missouri established its School of Journalism, which has since become one of the top journalism programs in the country.

4. Missouri's first female US Senator, Jean Carnahan, was appointed to the position on July 9, 2001, following the death of her husband, who had won the election but had not yet been sworn in. Carnahan served in the Senate until 2002.

5. On July 9, 1967, civil rights activist William L. Clay Sr. became the first African American to be elected to Congress from Missouri. Clay served in the House of Representatives for 32 years and was a prominent supporter of civil rights, education, and labor causes.