In this photograph taken on April 28, 2018, Afghan children work at a coal yard on the outskirts of Jalalabad, Afghanistan. (Photo by Noorullah Shirzada/AFP Photo)

An American soldier walks ahead of an MKIV (Mark IV) British-made tank, circa 1918. (Photo by Hulton Archive/Getty Images)

Undated UK Ministry of Defence handout photo of an RAF Tornado GR4 which has been painted in Gulf War “desert pink” paint scheme to honour the aircraft type's almost continuous operational service since the Royal Air Force helped liberate Kuwait from Saddam Hussein's forces, taken by SAC Rose Buchanan, which has been shortlisted for the general public to pick their favourite RAF Image of the Year. (Photo by SAC Rose Buchanan/MoD Crown Copyright/PA Wire)

Garbage containers burning at the Aragón street barricade during the demonstration in Barcelona, Spain on February 18, 2021. Third night of protests and riots in response to the arrest and imprisonment of rapper Pablo Hasel accused of exalting terrorism and insulting the crown from the content of the lyrics of his songs. (Photo by Paco Freire/SOPA Images/Rex Features/Shutterstock)

A woman holds up the Chinese national flag as people gather to watch the the launch of the Long March 5B rocket carrying China's Tianhe space station core module from the Wenchang Spacecraft Launch Site in Hainan Province, China, 29 April 2021. China launched into space the core module of its space station, marking the beginning of a series of launch missions to complete the space station by the end of next year. (Photo by Matjaz Tancic/EPA/EFE)

Nursing students attend a capping ceremony on May 10, 2021 in Jinan, Shandong Province of China. International Nurses Day is observed annually on May 12. (Photo by Zhang Yong/China News Service via Getty Images)

Participant Elena Tsagrinou of Cyprus performs during first semi-final of the 2021 Eurovision Song Contest in Rotterdam, Netherlands on May 18, 2021. (Photo by Piroschka Van de Wouw/Reuters)

Father Felix Mendoza, a Venezuelan Catholic priest, center, prays over a woman who cries, saying she is in physical pain, at a public hospital in Caracas, Venezuela, Tuesday, May 11, 2021, amid the new coronavirus pandemic. Father Felix has been visiting patients at the hospital to comfort the sick, for the last 20 years. (Photo by Ariana Cubillos/AP Photo)