1. In 1970, students at the University of Minnesota organized a protest against the Vietnam War on May 4. This was part of a national movement that culminated in the Kent State shootings later that day.

2. May 4, 1886 marked the beginning of the Haymarket Riot in Chicago. The incident started with a rally in support of workers' rights, but ended in violence when a bomb was detonated and police fired into the crowd.

3. May 4, 1999 saw the opening of Mall of America's "Nickelodeon Universe," a theme park that features rides and attractions based on popular Nickelodeon characters like SpongeBob SquarePants and Dora the Explorer.

4. On May 4, 1961, the first U.S. astronaut (Alan Shepard) was launched into space. This historic event paved the way for the eventual moon landing, which took place eight years later.

5. In 1929, the iconic Foshay Tower in downtown Minneapolis was completed on May 4. Considered one of the earliest skyscrapers in the city, the building was once the tallest in the Midwest and served as a symbol of progress and technological advancement.