1. On May 22, 1959, a tornado outbreak occurred in Iowa that resulted in 12 tornadoes touching down in the state. The severe weather caused widespread damage and resulted in multiple deaths and injuries.

2. The first ever Rotary Club in Iowa was established on May 22, 1912, in the city of Waterloo. The Rotary Club is a service organization that aims to provide humanitarian aid and promote goodwill around the world.

3. On May 22, 1863, during the American Civil War, the 23rd Iowa Infantry Regiment was engaged in the Battle of Vicksburg. The regiment played a crucial role in the Union Army's successful siege of the Confederate-held city.

4. Iowa native Shawn Johnson, a retired Olympic gymnast, was born on May 22, 1992. Johnson won four Olympic medals, including a gold medal on balance beam, and went on to become a popular television personality.

5. On May 22, 1914, the first ever flight carrying airmail in the United States took place in Iowa. Iowa City was the site of this historic flight, which flew to the nearby town of Kalona and marked the beginning of a new era in mail delivery.