1. On June 3, 1968, the Treaty of Guadalupe Hidalgo was signed, officially ending the Mexican-American War and establishing the Rio Grande as the border between Texas and Mexico.

2. On June 3, 1871, John Tunstall, an Englishman and cattle rancher in Lincoln County, was murdered in what became known as the Lincoln County War. This event sparked a series of conflicts between rival factions in the area and eventually led to the famous gunfight at the OK Corral.

3. June 3, 1937 marked the dedication of Carlsbad Caverns National Park. This unique natural wonder attracts thousands of visitors each year with its stunning and vast underground chambers filled with intricate formations of stalactites and stalagmites.

4. On June 3, 1946, the first flight of the Bell X-1 rocket plane took place at Holloman Air Force Base. Piloted by Chuck Yeager, this plane became the first to break the sound barrier, ushering in a new era of aviation technology and exploration.

5. June 3, 1998 saw the opening of the New Mexico Museum of Natural History and Science in Albuquerque, which features exhibits on the state's geological and paleontological history, as well as astronomy and space exploration.