An Iraqi special forces soldier shot dead an Islamic State suicide bomber in Mosul, Iraq March 3, 2017. (Photo by Goran Tomasevic/Reuters)

School leavers celebrate their graduation in Moscow's Red Square in Moscow, Russia on June 20, 2019. (Photo by Artyom Geodakyan/TASS)

Students carry a female trainee who has fallen into a stupor during high intensity training at Tianjiao Special Guard/Security Consultant camp on the outskirts of Beijing December 1, 2013. Former Chinese soldier Chen Yongqing has big ambitions for his bodyguard training school Tianjiao, which he says is China's first professional academy to train former soldiers and others as personal security guards. Chen charges 500,000 yuan ($82,400) a year for each protector as China's rich and famous look to bolster their safety and sense of importance. (Photo by Jason Lee/Reuters)

Aerial view of the Christ The Protector Statue and the Valle de Taquari on April 20, 2021 in Encantado, Brazil. The statue being built in Encantado, southern Brazil, will surpass the iconic Christ The Redeemer of Rio de Janeiro by seven meters. Made of steel and concrete, it will stand 43 meters including its pedestal, and become the third-tallest statue of Jesus Christ in the world. (Photo by Buda Mendes/Getty Images)

A worker stands under covered elephant statues at the Ambedkar Park on January 11, 2012 in Noida, Uttar Pradesh, India. India's Election Commission has ordered the covering up of statues, the symbol of the Bahujan Samaj Party, ahead of next month's elections in the state of Uttar Pradesh. (Photo by Daniel Berehulak /Getty Images)

A worker fills a public bus with diesel as the bus driver and passengers look on, at a fuel station in Kolkata, India, February 1, 2017. (Photo by Rupak De Chowdhuri/Reuters)

Russian cadet preparing before the International Kremlin Cadet Ball in Moscow, Russia 12 December 2017. More than 1500 students from all Russian cadets school attend in Cadet Ball. (Photo by Yuri Kochetkov/EPA/EFE)

The three orangutans at Pairi Daiza zoo, Belgium, developed a “special bond” with the otters after their river was run through the ape enclosure on March 2020. The zoo said it enriched both species’ environments. An animal – and this is even more the case of orangutans, with whom humans share 97 per cent of their DNA – must be entertained, occupied, challenged and kept busy mentally, emotionally and physically at all times. (Photo by Pascale Jones/The Sun)