An elderly Chinese man walks past a security guard holding a prong for restraining attackers near a portrait of Mao Zedong and Cultural Revolution anti-soviet banners at a curio market in Beijing, China, Monday, May 16, 2016. Exactly 50 years ago, China embarked on what was formally known as the Great Proletarian Cultural Revolution, a decade of tumult launched by Mao Zedong to revive communist goals and enforce a radical egalitarianism. The milestone was largely ignored Monday in the Chinese media, reflecting continuing sensitivities about a period that was later declared a "catastrophe." Agitation against the Soviet Union's retreat from Stalinism was a major driving force of the 1966-76 Cultural Revolution. (AP Photo/Ng Han Guan), APTOPIX