1. In 1902, the Arizona Rangers were established, tasked with maintaining law and order in the territory. The Rangers were renowned for their bravery and toughness, and played an important role in shaping Arizona's early history.

2. On June 3, 1924, Arizona's original Route 66 was designated as one of America's first federal highways. The route brought many people to Arizona, helping to usher in a new era of economic growth and development in the state.

3. June 3, 1965 saw the dedication of the Glen Canyon Dam, one of the largest dams in the United States. The dam provides hydroelectric power, controls flooding, and helps to regulate the flow of the Colorado River.

4. In 1977, Arizona became the first state to recognize Martin Luther King Jr. Day as a holiday. The holiday was not recognized nationally until 1983, and Arizona faced significant controversy and backlash for its decision to recognize the civil rights leader.

5. More recently, on June 3, 2017, wildfires broke out across the state, threatening homes, businesses, and natural resources. The fires, which burned for several days, were the result of extreme heat and dry conditions, and underscored the ongoing challenges posed by climate change in the region.