1) The Super Bowl is the championship game of the National Football League (NFL) in the United States and is one of the most-watched television events each year.

2) The destructive power of cyclones is often attributed to their storm surge, which is a rise in sea level caused by the strong winds and low atmospheric pressure.

3) The Dow Jones Industrial Average (DJIA) is a stock market index that tracks the performance of 30 large, publicly owned companies in the United States.

4) The first successful human heart transplant was performed by Dr. Christiaan Barnard in 1967.