An Aden civilian crouching in terror as British soldiers threaten him during Arabian demonstrations in Crater. (Photo by Express Newspapers/Getty Images). 1967
Tsar Alexander II (1818–1881) known as “The Liberator” lying in state. He was mortally wounded by an assassination attack in St Petersburg. (Photo by Hulton Archive/Getty Images). March 1881
NEW YORK - SEPTEMBER 19: Aisha Tyler attends Worldwide Launch of 'Gears of War 3' for Xbox 360 at Best Buy Theater on September 19, 2011 in New York City. (Photo by Jemal Countess/Getty Images for Xbox)
DUNEDIN, NEW ZEALAND - FEBRUARY 27: Dan Sims of Auckland clears a jump during the National Downhill Mountainbike Championships on Signal Hill, February 27, 2011 in Dunedin, New Zealand. (Photo by Phil Walter/Getty Images)
Farmhand Beatrice Jasiewicz (L) looks on as a colleague carries an injured goose on an open field at the Oekohof Kuhhorst organic farm near Berlin on November 24, 2011 in Kuhhorst, Germany. Goose is the traditional Christmas Eve dinner in Germany. (Photo by Sean Gallup/Getty Images)
Yolanthe Cabau attends amfAR MILANO 2011 at La Permanente on September 23, 2011 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images for amfAR)
A Porcupine on display during the PBS portion of the 2010 Summer TCA Press Tour at the Beverly Hilton Hotel on August 5, 2010 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)