International artist Yvette Mattern shows her stunning laser rainbow projection, Global Rainbow, on March 1, 2012 in Whitley Bay, England. The light installation celebrates the London 2012 Cultural Olympiad in the north-east of England. The Global Rainbow has previously lit up the skies of Germany, France and the United States. The projection will shine along the North Tyneside coastline for 4 days, before moving to other locations in the UK. (Photo by Bethany Clarke/Getty Images)

A dancer performs before a judging panel during the World Irish Dancing Championships in Dublin, Ireland on April 11, 2017. The April 9-16 event draws some 5,000 performers from Ireland and overseas, including from both the Irish diaspora in places like the United States and Australia as well as less likely countries such as Russia and Japan. (Photo by Clodagh Kilcoyne/Reuters)

In this September 10, 1977, file photo, from left, Hua Guofeng, Chinese Communist Party (CCP) chairman and Mao Zedong's immediate successor; Ye Jianying, CCP vice chairman and future ceremonial head of state; Deng Xiaoping, no formal titles at the time but soon to emerge as paramount leader during the reform era; Li Xiannian, CCP vice chairman and future president; Wang Dongxing, head of the leadership bodyguard unit who helped topple the Gang of Four, view the body of later Chinese leader Mao Zedong in Beijing. (Photo via AP Photo)

Two children jumping through a water hydrant's shower on a New York street. They have come from a neighbouring co-educational playgroup organised by the city's Police Department. (Photo by Orlando/Getty Images). 1950

A .44 Colt Dragon with a traditional Cowboy's hat. This weapon was originally used in the Mexican War of 1846-8 and it is typical of the type used in the “Wild West” of America. (Photo by Orlando /Three Lions/Getty Images). Circa 1950

Young man making the O.K. sign. (Photo by George Marks/Retrofile/Getty Images). Circa 1950s

A woman looks across as a gay parade participant poses for pictures during Gay Pride parade in Madrid, Spain, Saturday, July 2, 2016. Hundreds of thousands of people defied high temperatures and relative security concerns and turned out in Madrid to march in Saturday's LGTB Pride parade, one of the biggest in Europe, along the streets of the Spanish capital, just three weeks after members of the gay, lesbian, bisexual and transgender community were tragically victimized in a shooting massacre at a United States nightclub. (Photo by Daniel Ochoa de Olza/AP Photo)

A journalist (R) is attacked by residents who are trying to prevent migrants from disembarking on the Greek island of Lesbos, on March 1, 2020. The United Nation called on March 1 for calm and urged states to refrain from “excessive” force, as thousands of migrants have flooded to Turkey's border with Greece in a bid to enter the EU. A massive influx of migrants swelled along the border over the weekend after Turkey's President Recep Tayyip Erdogan threatened to open its frontier to Europe as tensions mount over its deepening conflict in Syria. (Photo by AFP Photo/Stringer)