1) On August 3, 1820, the Treaty of Prairie du Chien was signed in what is now Wisconsin. The treaty established peace and trade relationships between the United States and several Native American tribes, including those in Minnesota.

2) In 1857, the Lowry Hill Tunnel in Minneapolis first opened to traffic on August 3. The tunnel allowed for easier access to the western suburbs and was a major engineering feat at the time.

3) August 3, 1968 marks the opening of the Guthrie Theater in Minneapolis. Founded by Sir Tyrone Guthrie, the theater has become a major cultural institution in the city and has hosted numerous world-renowned productions.

4) On August 3, 1981, the world's first fully computer-generated feature film, "Tron," premiered in theaters. The film was produced by Minnesota-based animation studio, Pixar.

5) August 3, 2007 saw the collapse of the I-35W Mississippi River bridge in Minneapolis. Thirteen people were killed and dozens more were injured in the tragic event, which led to increased scrutiny of infrastructure across the country.