1. On April 16, 1947, the deadliest industrial accident in Oklahoma history occurred in Texas City, Texas. The explosion and fire took the lives of over 500 people, many of whom were from Oklahoma.

2. In 1973, the Oklahoma City Thunder basketball team (then known as the Seattle SuperSonics) won their first playoff game in franchise history on April 16, 1978, against the Denver Nuggets.

3. On April 16, 1908, the Farmers' National Congress was held in Oklahoma City, where delegates from across the state discussed agricultural issues and proposed legislation.

4. In 1945, a tornado struck Oklahoma City on April 16, leaving 18 dead and injuring over 400.

5. On April 16, 1985, the Oklahoma City bombing occurred, killing 168 people and injuring hundreds more. The bombing remains one of the deadliest terrorist attacks in US history.