1. On June 5, 1900, the first train arrived in the city of Las Vegas. The train was operated by the San Pedro, Los Angeles and Salt Lake Railroad, which later became known as the Union Pacific Railroad. This event marked the beginning of Las Vegas' transformation from a small desert town to a major transportation hub and tourist destination.

2. On June 5, 1931, the Nevada state legislature passed a law legalizing gambling in the state. This decision was made during the Great Depression, when Nevada was facing significant financial challenges. The legalization of gambling helped to spark the growth of the casino industry in Las Vegas and other parts of the state, which has become a major economic driver for Nevada.

3. On June 5, 1955, the Moulin Rouge Hotel and Casino opened in Las Vegas, becoming the first integrated hotel and casino in the city. The Moulin Rouge was a popular destination for African American performers and patrons, but it struggled to stay in business and ultimately closed less than a year after opening. Nonetheless, the hotel was a significant milestone in the struggle for civil rights and equality in Las Vegas.

4. On June 5, 1971, the Nevada Test Site was permanently closed. The site had been used for nuclear weapons testing by the US government since 1951, and had become a major source of radioactive contamination in the area. The closure of the site was a critical step in reducing the risk of nuclear disaster and protecting public health in Nevada and beyond.

5. On June 5, 2015, the US Supreme Court ruled that same-sex marriage was legal nationwide, including in Nevada. This decision marked a major victory for LGBTQ+ rights and equality in the United States, and paved the way for many other important legal and social changes in the years that followed. Nevada has since become one of the most LGBTQ+-friendly states in the country, with a strong tradition of activism and advocacy on behalf of the community.