A US Army M1A2 SEP tank participates in the Strong Europe Tank Challenge 2017 at the military training area in Grafenwoehr, Germany, 12 May 2017. Six North Atlantic Treaty Organization (NATO) nations and partner nations, Austria, France, Germany, Poland, Ukraine and the USA are taking part in this competing exercise. (Photo by Christian Bruna/EPA)

Competitors take part in the annual Mud Madness event at Foymore Lodge on April 22, 2018 in Portadown, Northern Ireland. The adult version of the event includes two laps of an 8km course through 25 obstacles while the kids event is run over 2kms. The race is in it's eleventh year and is sponsored by McVities Jaffa Cakes and event charity partner Marie Curie together with other numerous charities and fundraising groups. (Photo by Charles McQuillan/Getty Images)

A bull savar (jockey) guides his bulls as he competes in a bull race on the outskirts of Islamabad, Pakistan July 1, 2018. (Photo by Faisal Mahmood/Reuters)

A transgender woman waits backstage to perform during an event to raise funds for their community in Mumbai, India, September 20, 2018. (Photo by Francis Mascarenhas/Reuters)

Base jumpers leap from the 300-metre high skydeck of Malaysia's landmark Kuala Lumpur Tower against the backdrop of the city's skyline in Kuala Lumpur on September 30, 2018 during the annual International KL Tower Base-Jump event. (Photo by Manan Vatsyayana/AFP Photo)

“Show us our butts! Mucawana tribe – Angola. In Soba village, the Muhacaona (Mucawana) tribe, perhaps the best place i have visited. They use cow dung and fat to make this so nice haircut, and love the beads. They asked me to make pictures of their backs... and butts to see on the camera screen if everything was perfect!”. (Photo and comments by Eric Lafforgue)

A woman hangs red chillies to dry outside her house at Khokana village on the outskirts of Kathmandu on August 5, 2020. (Photo by Prakash Mathema/AFP Photo)

A Kashmiri Shiite Muslim flagellates himself during a Muharram procession in Srinagar, Indian controlled Kashmir, Tuesday, October 11, 2016. Muharram is a month of mourning in remembrance of the martyrdom of Imam Hussein, the grandson of Prophet Mohammed. (Photo by Dar Yasin/AP Photo)