1. On July 16, 1969, the famous astronaut Neil Armstrong uttered the famous words "One small step for man, one giant leap for mankind" as he became the first human to ever set foot on the moon. This historic event was broadcasted live and watched by people around the world.

2. In 1805, the Lewis and Clark Expedition reached the mouth of the Yellowstone River in what is now Montana. The expedition's aim was to explore and map the western part of the United States, commissioned by then-president Thomas Jefferson. The expedition was a pivotal moment in American history and helped map out previously unknown territories.

3. In 1920, the Republican National Convention was held in Chicago, Illinois where Warren G. Harding was nominated as the presidential candidate. The convention marked the first time that a major political party in the United States held its national convention in the Midwest.

4. On this day in 1946, the popular American actress and singer, Ginger Rogers, was crowned as the queen of the Krewe of Venus in New Orleans. The Krewe of Venus is a women-only organization responsible for putting on Mardi Gras festivities and parades every year.

5. In 1942, the U.S. Army Air Corps began construction on the Selman Field Army Air Corps Basic Flying School in Monroe, Louisiana. The base was used to train pilots for service in World War II and was named after Major James Selman, who was a pioneer of military aviation. The base remained in operation until its closure in 1961.