A Polisario fighter sits on a rock at a forward base on the outskirts of Tifariti, Western Sahara, September 9, 2016. At a rocky outpost in Western Sahara, a new generation of soldiers who have never known war are mobilising as tensions resurface in one of Africa's oldest disputes after a quarter century of uneasy peace. (Photo by Zohra Bensemra/Reuters)

A mural painting by graffiti artist Eme Freethinker features likenesses of US President Donald Trump (R) and Chinese premier Xi Jinping wearing face covers in Berlin on April 28, 2020 amid the new coronavirus COVID-19 pandemic. (Photo by John Macdougall/AFP Photo)

Journalists wear face mask and keep distance as they attend news conference by German Health Minister Jens Spahn about the developing of the coronavirus crisis test strategy in Berlin, Germany, Thursday, August 6, 2020. (Photo by Markus Schreiber/AP Photo)

A schoolgirl walks on an under-construction railway track at Navapura, on the outskirts of Ahmedabad, November 29, 2019. (Photo by Amit Dave/Reuters)

Poland's Piotr Lisek celebrates after winning in the Men's pole vault during the IAAF Diamond League competition on July 12, 2019 in Monaco. (Photo by Eric Gaillard/Reuters)

A sculpture made by activists on Lambeth bridge during the Extinction Rebellion protest in London, England on October 7, 2019. (Photo by Henry Nicholls/Reuters)

A model presents a creation by Indian designer Amit Aggarwal during the grand finale of the Lakme Fashion Week (LFW) Summer/Resort 2020 in​ Mumbai, India, 16 February 2020. (Photo by Divyakant Solanki/EPA/EFE)

People celebrate media announcing that Democratic U.S. presidential nominee Joe Biden has won the 2020 U.S. presidential election in Alphabet City neighborhood of Manhattan, in New York City, U.S. November 7, 2020. (Photo by Andrew Kelly/Reuters)