1. On September 19, 1848, the Gadsden Purchase was signed. The purchase added 29,670 square miles of land to the United States, including parts of what is now Arizona and New Mexico.

2. In 1910, the first plane flew in Arizona. Johnstone Aviation, a company based in Los Angeles, demonstrated a Curtiss biplane on a field in Phoenix, paving the way for the state's future role in aviation.

3. In 1963, the Glen Canyon Dam was dedicated by then-president Lyndon B. Johnson. The dam was built on the Colorado River near Page, Arizona, and created Lake Powell, which is now a popular tourist attraction.

4. On September 19, 1985, a memorial was dedicated in Prescott to the Granite Mountain Hotshots, a firefighting crew that lost 19 members in the Yarnell Hill Fire in June of that year.

5. In 1996, the Grand Canyon National Park celebrated its 75th anniversary. The canyon, which is one of the Seven Natural Wonders of the World, has been protected as a national park since 1919.