1. On June 4, 1891, the town of Independence, Iowa was devastated by a tornado. The twister caused extensive damage to homes and businesses, and killed at least 8 people. The town rallied together to rebuild, and Independence remains a vibrant community to this day.

2. In 1913, on June 4th, the Iowa State Capitol building was completed after a decade of construction. The magnificent structure, which stands tall in Des Moines to this day, features a dome that is taller than the US Capitol's dome.

3. June 4, 1944 marked the date of the D-Day invasion in WWII, which set off a chain of events that would eventually lead to the end of the war. Many Iowans served bravely in the war effort, and some made the ultimate sacrifice to protect our freedoms.

4. On June 4, 1979, the iconic rock band Pink Floyd played a concert in Des Moines as part of their "The Wall" tour. The band played hits like "Comfortably Numb" and "Another Brick in the Wall" to a packed house at the Veterans Memorial Auditorium.

5. Finally, on June 4, 2008, Barack Obama became the presumptive nominee for the Democratic Party in the US Presidential race. His campaign held a rally at the Iowa State Fairgrounds in Des Moines, where he gave a rousing speech that energized his supporters and helped propel him to victory in the general election.