1. In 1927, the first annual Navajo Nation Fair was held in Window Rock, Arizona. This fair celebrates Navajo culture with events such as rodeos, traditional dances, and a Miss Navajo Nation pageant.

2. On August 10, 1928, the Hoover Dam project began in Black Canyon on the Colorado River. The dam, which was completed in 1936, provides hydroelectric power to Arizona, Nevada, and California.

3. In 1981, the Pima Air & Space Museum opened in Tucson, Arizona. It is one of the largest non-government funded aviation museums in the world.

4. On August 10, 1999, the U.S. Postal Service issued a stamp honoring Sedona, Arizona. The stamp features the red rock formations that make the area famous, and was designed by Sedona artist Kim Novak.

5. In 2016, the town of Jerome, Arizona celebrated its centennial anniversary. Jerome began as a mining town in the late 1800s, and later became a ghost town before being revitalized as a tourist destination in the 1960s.