1. 1923: Howard Carter unseals the burial chamber of Pharaoh Tutankhamun in Egypt, revealing the treasures within.

2. 1959: Fidel Castro becomes the Prime Minister of Cuba after overthrowing the government of Fulgencio Batista.

3. 1968: The first 911 emergency telephone system is inaugurated in Haleyville, Alabama.

4. 2005: The Kyoto Protocol, an international treaty aimed at combating global warming, comes into force.

5. 2005: The National Hockey League (NHL) cancels its entire 2004-2005 season due to a labor dispute, marking the first time a major North American professional sports league cancels an entire season.