1. In 1929, the state Capitol building in Oklahoma City suffered a major fire. The fire caused extensive damage to the building and destroyed many important documents, including records from the State Supreme Court.

2. In 1948, Oklahoma declared its state song to be "Oklahoma!", written by Rodgers and Hammerstein. The song became the title song of their hit Broadway musical and was adopted as the official state song in recognition of the production's great success.

3. On January 16, 1959, the famous country western singer, Patsy Cline, performed at the Cimarron Ballroom in Tulsa, Oklahoma. She was joined by several other popular musicians of the era, including Wanda Jackson.

4. In 1973, Oklahoma became the first state to set up a child support enforcement agency. The agency's goal is to ensure that children receive the financial support they are entitled to from both parents.

5. On this day in the year 2000, the Crosstown Expressway, a major highway in Oklahoma City, was officially renamed the Vietnam Veterans Memorial Highway in honor of the state's many Vietnam veterans. This highway runs through the heart of Oklahoma City and is a vital link for commuters and travelers alike.