1. Arizona became the 48th state admitted to the Union on January 26, 1912. This marked the end of a long struggle for statehood that lasted over 50 years, as Arizona had been a territory since 1863.

2. In 1937, the city of Tucson experienced the worst flood in its history on January 26. Heavy rains caused the Santa Cruz River to overflow, damaging homes, businesses, and infrastructure in the area. The flood caused over $20 million in damage and left thousands homeless.

3. On January 26, 1953, the Navajo Nation Council approved the Navajo Tribal Code, which established laws and regulations for the Navajo Nation. The code was based on traditional Navajo customs and practices, and helped to preserve the tribe's cultural heritage.

4. In 1965, astronaut Edward H. White II made history when he became the first American astronaut to walk in space. The spacewalk took place on January 26, during the Gemini IV mission, and lasted for 23 minutes.

5. On January 26, 2005, a fire broke out at the Palo Verde Nuclear Generating Station, located in Wintersburg, Arizona. The fire, which started in an electrical panel, was contained within 12 minutes and did not cause any injuries or damage to the plant's nuclear reactors.