In this file photo taken November 1, 1967, Chinese citizens view writings and slogans emblazoned on a wall at the height of the decade-long Cultural Revolution initiated a year earlier by Communist Party Chairman Mao Zedong in Beijing. On May 16, 1966, the Communist Party's Politburo produced a document announcing the start of what was formally known as the Great Proletarian Cultural Revolution to pursue class warfare and enlist the population in mass political movements. Launched by leader Mao Zedong, it set off a decade of tumult to revive communist goals and enforce a radical egalitarianism. (Photo by AP Photo)





In this May 21, 1936 file photo, President Franklin D. Roosevelt and first lady Eleanor Roosevelt greet D.G. Durham, sitting in a wheelchair, during the annual garden party for disabled veterans at the White House in Washington. At center left is the president's military aide, Col. E.M. Watson. (Photo by AP Photo)





Turkey's first President Mustafa Kemal Ataturk (C) is seen in Izmir, Turkey, after the modern Turkish Republic was founded in 1923. (Photo by Reuters/Stringer)





A view of Kordon after “The Great Fire” in the Aegean port city of Izmir, Turkey, in 1922. (Photo by Reuters/Stringer)





Japan's Crown Prince Akihito (L) and Crown Princess Michiko parade through the streets on their wedding day in Tokyo, Japan, in this photo taken April 10, 1959 and released by Kyodo. (Photo by Reuters/Kyodo News)





A B&W Model 1 aircraft, produced by Pacific Aero Product Company, which was later changed to the Boeing Airplane Company, is shown at Lake Union in Seattle, Washington in this publicity photo from the Boeing Company. (Photo by Reuters/Boeing)





The “Red Barn”, which was part of what would later be called Boeing's Plant 1 on Seattle's Duwamish waterway and which served as a production facility starting in 1917, is shown in this publicity photo from the Boeing Company. (Photo by Reuters/Boeing)





The C-97 military transport plane, developed near the end of World War II, is shown in this publicity photo from the Boeing Company. (Photo by Reuters/Boeing)





Female riveters are shown assembling the tail fin of a B-17 Flying Fortress at The Boeing Company's Plant 2 in this 1943 publicity photo from the Boeing Company. (Photo by Reuters/Boeing)





The Ramesseum of El-Kurneh, Thebes, 1857. (Photo by Francis Frith/Lucy Dalbiac Luard Fund/Boston Museum of Fine Arts)





Child star Virginia Davis on an outdoor set for the finale of Alice’s Spooky Adventure (1924), one of Walt Disney’s early silent short films, which mixed live action with animation. Disney (second from left) directs. (Photo by Courtesy Walt Disney Archives Photo Library)





Colin O’Brien’s photograph of one of the last trams to run in London, UK in 1952. (Photo by Colin O’Brien)





Nadezhda Krupskaya’s funeral (Lenin’s wife) in Moscow, Russia, 1930s. (Photo by Sergey Korshunov)





Flooding in Kursoviy lane, Moscow, Russia after storm rains, 1940s. (Photo by Semen Mishin-Morgenstern)





Demonstration in Kimry, Russia, 1920s. (Photo by Leonid Shokin)





Greek athlete Nikolaos Andriakopoulos on his way to win the gold medal in the rope climbing event at the first modern International Summer Olympic Games held at the Panathinaiko Stadium on April 10, 1896 in Athens, Greece. (Photo by AP Photo)





Great Britain (The Liverpool St Police tug-of-war team) taking on Ireland in the tug-of-war event at the 1908 London Olympics, July 1908. The Liverpool St Police tug-of-war team beat the USA team and won the gold medal. William Hirons, Frederick Goodfellow, Edmond Barrett, James Shephard, Frederick Humphreys, Edwin Mills, Albert Ireton and Frederick Merriman. (Photo by Topical Press Agency/Getty Images)





In this July 24, 1915 file photo, passengers are rescued as they stand atop The Eastland passenger ship after the vessel capsized in the Chicago River in downtown Chicago. As it was preparing to leave the dock, the Eastland rolled over, trapping passengers in the lower decks, where 844 drowned or were suffocated. On Friday, July 24, 2015 Chicago, historians and ancestors of the victims are marking the 100th anniversary of the disaster, the deadliest in city history. (Photo by AP Photo)





Florida, Everglades National Park. November 29, 1948. (Photo by New York Post/Photo Archives, LLC via Getty Images)





Thrills in the High Sierras,. alifornians take up an alpine sport skiing in Lassen Volcanic National Park, California. The Man in foreground is ted Rex, famous ski jumper. February 23, 1933. (Photo by New York Post/Photo Archives, LLC via Getty Images)





Paul Bunyan Comes To Lift. A carving of Paul Bunyan and his Blue Ox, said to be the world's largest carving from a single piece of wood, takes shape under the ax and chisel of sculptor Carrol Barnes in the foothills leading to Sequoia National Park near Vasalia, Cal. Barnes holds 40-inch model for his carving, & which is being cut from a 25-foot log of sequoia. May 18, 1942. (Photo by New York Post/Photo Archives, LLC via Getty Images)





Winging Its Way Past The Peaks Of The Rockies. An air liner from union air terminal passing the towering peaks of the grand Tetons in Wyoming. On the inaugural flight of the new direct service of western air express from los Angeles to yellows tone national park. August 07, 1940. (Photo by New York Post/Photo Archives, LLC via Getty Images)





The Shovel Shuffle. Form ants a tight rein on the shovel handles count' a lot in the bottom side shovel races down Chinook pass on the edge of mount rainier (Wash) national park, USA. Now that June weather has cut down the huge drifts which kept this area closed during winter months, fans have taken over the slopes using them for races like this. Sun glasses protect eyes from sun glare. June 11, 1941. (Photo by New York Post/Photo Archives, LLC via Getty Images)





Old Faithful Performing For The President. Yellowstone National Park President Franklin D. Roosevelt is seated in his car as he watches Old Faithful Yellowstone park geyser blow off steam during his sightseeing trip through the huge park. Today the President in Boise, Enroute to Seattle wash. September 30, 1937. (Photo by New York Post/Photo Archives, LLC via Getty Images)





The slaughtering of animals for meat during the Boer War, 1900. (Photo by Topical Press Agency/Getty Images)





Rin Tin Tin the famous Warner Brothers animal film star, answering some fan mail, circa 1938. (Photo by General Photographic Agency/Getty Images)





A woman at the opening of the Radio Exhibition at Olympia Exhibition Centre, west London, holds up the smallest radio in the show – an all mains electric, 4 valve Sunbeam Midget, priced at six pounds six shillings; 15th August 1933. (Photo by J. A. Hampton/Topical Press Agency/Getty Images)





Skegness landladies Hazel Adams and Marjorie Romanis wearing 1914 bathing costumes on the beach in the snow for publicity photographs, circa 1975. (Photo by Ian Tyas/Keystone Features/Getty Images)





Members of Davy Jones’ crew boarded a fire engine after landing on the Seattle waterfront on August 14, 1950. (Photo by George Carkonen/The Seattle Times)





This 1905 photo provided by The Field Museum shows staff preparatory Richard Raddatz posing next to an alligator gar at the Field Columbian Museum in Chicago. Biologists are restocking alligator gar to waterways throughout the middle of the country, hoping the alligator gar – a giant fish once driven to extinction in much of its historic range – can help control invasive Asian carp. (Photo by Charles Carpenter/The Field Museum via AP Photo)





In this August 8, 1942 file photo, members of the Standing Rock Sioux perform an ancient War Dance ceremony to support soldiers of their tribe on duty with the U.S. Army, in Little Eagle, S.D. The service flag behind them shows 22 stars, indicating the number of Little Eagle tribesmen serving . The War Dance ceremony was the first one to be performed in 52 years. (Photo by U.S. Signal Corps via AP Photo)





Baby boys (6-11 months) boxing. (Photo by Bettmann Archive)





A nanny supervising a baby suspended in a wire cage attached to the outside of a high tenement block window in United Kingdom, 23rd June 1937. The cages are distributed to members of the Chelsea Baby Club who have no gardens and live at the top of high buildings. (Photo by Reg Speller/Fox Photos/Getty Images)





Children sleeping on the roof of a school, for orphans, 20s. (Photo by Fox Photos/Getty Images)





A small brother is left in a'safe' place – a mesh litter bin in St James's Park, London by his bigger brothers who have gone to play, 27th July 1937. (Photo by Reg Speller/Fox Photos/Getty Images)





Babies (6-11 months) hanging on clothes line. (Photo by Bettmann Archive)





A mother fastening a notice reading “Please Mr Motorist, watch out for me”, onto her son's back before he sets out on a trial bicycle ride in UK, 40s. (Photo by Hulton Collection/Getty Images)





Children receiving ray treatment at the child welfare centre in Harrow Road, west London, circa 1938. (Photo by Hulton Archive/Getty Images)





Two young boys kneel on stools on either side of a round table as one uses a match to this the other's cigarette, November 12, 1928. (Photo by FPG/Getty Images)





A day nursery in the East End of London, where the children shelter in a linen cupboard during an air raid, circa 40s. (Photo by Keystone Features/Getty Images)