1. In 1933, Nevada legalized gambling, making it one of the first states in the U.S. to do so. This decision paved the way for the growth of Las Vegas as a popular tourist destination, and gambling became a major industry in the state.

2. On February 10, 1954, the U.S. Air Force established the Nevada Test and Training Range, a vast military training and weapons testing facility in the desert near Las Vegas. Today, the range covers more than 2.9 million acres and is the largest military training area in the U.S.

3. The Hoover Dam, one of the most famous engineering feats of the 20th century, was completed on February 10, 1935. The dam, which spans the Colorado River on the border between Arizona and Nevada, provides hydroelectric power to much of the Southwest and is a major tourist attraction.

4. In 1979, the world's largest hotel at the time, the MGM Grand Hotel and Casino, opened in Las Vegas. The hotel featured over 2,000 rooms, a massive casino, and a variety of entertainment options, and it set a new standard for luxury on the Las Vegas Strip.

5. On February 10, 1961, the U.S. Army's Ballistic Missile Defense Command was established at the Nevada Test Site. The command was responsible for monitoring and tracking ballistic missiles launched during the Cold War, and played a crucial role in maintaining national security during this tense period in U.S. history.