A security guard and an unidentified man look at an area where several people were killed as they were caught in a surging crowd entering Cincinnati's Riverfront Coliseum for a concert by The Who, December 3, 1979. (Photo by Brian Horton/AP Photo)





Crowds holding posters of China's Communist Party leader Mao Zedong fill the street of a city in China, celebrating the triumph of the Communist revolution. Since seizing power amid civil war in 1949, the party has undergone a tumultuous history, but president and party leader Xi Jinping is emphasizing the country’s rise to economic, military and diplomatic over the past four decades since reforms were enacted. (Photo by AP Photo/File)





Speed demons beware...The Los Angeles motor corps with their new fleet of Indian motorcycles all ready and waiting to set out after Californian motorists who like to step on the gas on April 15, 1922. (Photo by Bettmann Archive)





Crowds and a paper storm greet President Franklin D. Roosevelt as he drives down 7th Ave. in New York City, October 28, 1940. (Photo by AP Photo)





“Peking school girls”. Chinese school children, circa 1924. (Photo by Library of Congress)





Two men with guns behind a barricade in a Dublin street during factional fighting over the recently established Free State Treaty on July 1, 1922. (Photo by Hulton-Deutsch Collection/Corbis via Getty Images)





Troops supporting the government of President Sun Yat-Sen armed with modern machine guns during civil war in China on February 5, 1922. (Photo by Topical Press Agency/Getty Images)





An interior view of the rigid airship USS Shenandoah, under construction at the Naval Air Station in Lakehurst, New Jersey, circa 1922 (Photo by Library of Congress)





(Original Caption) 7/29/1924. Paris, France. Men at work high above ground, painting the Eiffel Tower. (Phoot by Bettmann Archive)





A great military parade on the fifth anniversary of the Russian Revolution took place in Moscow, Russia, on November 20, 1922, and with horses being scarce the Red Army had to use American tractors to pull their artillery. (Photo by AP Photo)





National Guardsmen are put through riot training in Boston's Commonwealth Armory on Friday, October 18, 1974. Massachusetts Gov. Francis W. Sargent called up the guard to quell school violence, but the city has been relatively calm and the guard has remained in the armories. (Photo by JWG/AP Photo)





Teddy Roosevelt, 3d, at circus, (5/13/24). (Photo by Library of Congress)





Lake View women athletes Zilk, Sheffield and Sheffield running and jumping over hurdles on a track, Chicago, Illinois, 1924. (Photo by Chicago Sun-Times/Chicago Daily News collection/Chicago History Museum/Getty Images)





Thirty foot all of water raging towards beardstown, Illinois as the levee broke under the tremendous pressure on April 18, 1922. The Illinois River at flood stage, the highest ever known rapidly poured in the lowlands at the right. In foreground are the C.B. & Q. railroad tracks. The last connecting link between Beardstown and the outside world, just washed away. Photo was taken by Norman W. Alley of International Newsreel Staff. (Photo by Bettmann Archive)





Egyptian soldiers tend to wounded after an attack on the reviewing platform which killed Egyptian President Anwar Sadat in Cairo, Egypt, on October 6, 1981. Six others were also killed by members of the Al Jihad movement, religious extremists within Sadat's army, who opened fire during a military parade commemorating the eighth anniversary of the Arab-Israeli War of Oct. 1973. (Photo by AP Photo)