1974: Police officer on duty during the Ontario floods

1903: New York City's Flatiron building, surrounded by snow

1912: The Titanic, before her maiden voyage

The first stages of sculpting the head of President Abraham Lincoln on Mount Rushmore - 1927.

The 71-year-old Serbian king, Peter I, crosses the River Drin during the withdrawal of the Serbian army during World War I - December 1915.

Over 100,000 German prisoners of war in a temporary prison camp set up on the Western Front - May 1945.

The room in which the Russian Tsar Nicholas II and his family were executed by the Bolsheviks in Yekaterinburg, Russia - 1917.

Over 7,000 sacks of gold and silver that the Nazis stole from civilians in an underground safe - 1945.

An Austrian soldier looks at the ruins of the canvas hall, from one of the largest commercial buildings built in the Middle Ages, in Eper, Belgium - September 3, 1917.

Police disguised as athletes, preparing to attack the terrorists who took Israeli athletes hostage at the Munich Olympics - September 1972.

1924: Friends in Ohio enjoying their new ride.

1936: The back of the Hoover Dam, rarely seen without water.

1923: In Berlin a disabled World War I veteran begs for money.

1956: A common sign during apartheid in Johannesburg, South Africa.

1948: A young boy watches TV for the first time from a store window.

The Manhatten Bridge in New York during construction - 1903.

Charlie Chaplin on a film set of a burning circus - 1926.

French soldiers walking next to a dog disguised as a German officer, complete with binocular and pipe - 1915.

Dentistry under field conditions during the first world war - 1917.

Holiday shopping in New York - 1939.

This group of Russian women killed over 775 Nazis, more than any female fighter group in WWII - 1945.