A gunman named Gabriel Wortman rampaged through Nova Scotia, Canada.
Two Earth-like planets in one solar system were discovered.
After hyping the game up for years, Valve finally released Portal 2 for PC, PS3, and Xbox 360.
John Lennon sang 'Stand by Me' at his last ever solo live performance.
NBA hired the first African American coach Bill Russell for the Boston Celtics.
Genius Albert Einstein died due to heart failure at age 76.
The inaugural meeting of the International Court of Justice was held in The Hague, Netherlands.
Robert Menzies, Australia's longest-serving Prime Minister, was elected.
705 survivors of the Titanic arrived in New York City on board the Cunard Liner Carpathia.
A devastating earthquake in San Francisco destroyed over 80% of the city.
William Lamb became the British prime minister for the second time.
The Royal Academy of History (Real Academia de la Historia) was founded in Madrid by King Philip V of Spain.
The construction of St Peter's Basilica began in the Vatican.
Pope Saint Eusebius became the bishop of Rome.
