A riot policeman watches as a police vehicle burns in Braamfontein, Johannesburg, South Africa, Tuesday, October 25, 2016. Rioters in South Africa set a police vehicle on fire Tuesday and stoned vehicles near a Johannesburg university that has been the scene of sometimes violent protests by students demanding free education. The violence broke out in streets near the University of the Witwatersrand at around the same time that student protesters met and marched off the campus, South African media reported. (Photo by Yeshiel Panchia/AP Photo)

A worshipper prays during the Friday prayer at the Great Mosque in Ouagadougou, on January 28, 2022. Burkina Faso, the scene of a military coup on Monday, was suspended from the Community of West African States (ECOWAS) on Friday, following a virtual summit of the organization whose heads of state will meet again on February 3 in Accra to reassess the situation in this country. (Photo by Olympia de Maismont/AFP Photo)

A masquerade dances to drums along the streets during the kankurang Festival in Janjanbureh on January 27, 2024. Listed as a UNESCO World Heritage Site since 2005, Kankurang, a combination of the Mandingo words “kango” and “Kurango”, literally translated as “voice” and “force”, ensures the transmission and teaching of the values and practices that form the basis of Mandingo cultural identity, a West African people whose historical home was the Mali empire. (Photo by Muhamadou Bittaye/AFP Photo)

Mushers and theirs dog teams during the Sedivackuv long race, Orlicke Mountains, Czech Republic on January 28, 2016. The 240 Km (150 miles) race is a multi-day event, but was canceled today, two days early, because of poor snow conditions in the region. (Photo by David Tanecek/CTK via ZUMA Press)

Refugees and migrants try to find a place on an already full train headed for Serbia, near the city of Gevgelija, The Former Yugoslav Republic of Macedonia, on February 24, 2016. Refugees and migrants from Iraq and Syria continue to pass through Macedonia on their way to the European Union. (Photo by Georgi Licovski/EPA)

Participant wearing medieval costumes perform during an annual re-enactment of a battle near the village of Libusin, Czech Republic, April 23, 2016. About 2000 enthusiasts have come to simulate the medieval battle during the 24rd annual swordsmen gathering in Libusin village. (Photo by David W. Cerny/Reuters)

Participants wearing historical attire compete on historical high wheel Penny Farthing bicycles in the traditional 'One Mile Race' at Letna Park in Prague, Czech Republic, November 7, 2015. The meeting of Penny Farthing bicycles is taking place for the 22th time. (Photo by Filip Singer/EPA)

Aleksandra Krunic, of Serbia, drops to the court after defeating Petra Kvitova, of the Czech Republic, during the third round of the 2014 U.S. Open tennis tournament, Saturday, August 30, 2014, in New York. (Photo by Kathy Willens/AP Photo)