Riot police clash with protesters during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in Caracas, Venezuela, September 1, 2016. (Photo by Marco Bello/Reuters)

A protester gestures during a “Yellow vest” protest against higher fuel prices during clashes on the Champs-Elysees in Paris, France, November 24, 2018. (Photo by Benoit Tessier/Reuters)

Police intervene as two women fight at a pro-law enforcement rally that clashed with counter protesters demonstrating against racial inequality, in Denver, Colorado, U.S. July 19, 2020. (Photo by Kevin Mohatt/Reuters)

A policeman stands near a burning vehicle during clashes between supporters of former prime minister Imran Khan and riot police near Khan's house to prevent officers from arresting him, in Lahore on early March 15, 2023. Pakistan police appeared on March 15 to have given up an attempt to arrest former prime minister Imran Khan, ending a siege of his residence after violent clashes with hundreds of his supporters. (Photo by Arif Ali/AFP Photo)

A new book published by the UK Natural History Museum showcases some of the most memorable underwater photographs taken over the last few decades in its annual wildlife photographer of the year competition. Here: Giant gathering by Tony Wu. “The first indication that something extraordinary was going on were the blows, huge numbers of them – the exhalations of huge numbers of whales. Entering the water, the photographer witnessed an extraordinary scene”. (Photo by Tony Wu/Unforgettable Underwater Photography/NHM)

New Market traders rescue an injured shopkeeper who got hurt during a clash with students from Dhaka college in Dhaka on April 19, 2022. (Photo by Munir Uz Zaman/AFP Photo)

A protester clashes with riot police officers during a protest against the Asia-Pacific Economic Cooperation (APEC) Summit 2022, near the Democracy Monument in Bangkok, Thailand on November 18, 2022. (Photo by Tanat Chayaphattharitthee/Reuters)

Demonstrators help a fellow protester during clashes with security forces during an opposition rally in Caracas, Venezuela on April 4, 2017. Protesters clashed with police in Venezuela Tuesday as the opposition mobilized against moves to tighten President Nicolas Maduro' s grip on power. Protesters hurled stones at riot police who fired tear gas as they blocked the demonstrators from advancing through central Caracas, where pro- government activists were also planning to march. (Photo by Carlos Garcia Rawlins/Reuters)