1. On October 22, 1938, the Hoover Dam was officially dedicated by President Franklin D. Roosevelt. The dam, located on the Colorado River between Nevada and Arizona, provided much-needed hydroelectric power and irrigation to the surrounding areas.

2. In 1864, Nevada was admitted to the Union as the 36th state. October 22 marks Nevada Day, a state holiday celebrating this event and Nevada's history and culture.

3. In 1951, the Desert Inn hotel and casino opened on the Las Vegas Strip. Owned by notorious gangster Bugsy Siegel, the hotel became known for its luxurious accommodations and high-stakes gambling.

4. On October 22, 2002, the U.S. Senate passed the Yucca Mountain Nuclear Waste Repository Act, designating Yucca Mountain in Nevada as the site for a permanent nuclear waste storage facility. The controversial project faced opposition from many Nevadans and was ultimately halted in 2011.

5. Nevada was home to many notable figures in American history, including author Mark Twain, who lived in Virginia City in the 1860s and wrote about the region in his book "Roughing It." Twain also worked as a reporter for the Territorial Enterprise newspaper in Virginia City.