Pedestrians cover their face as they walk along the dusty road in Kathmandu, Nepal February 27, 2017. Nepal has forced 2,500 old vehicles off roads in its capital city of Kathmandu, part of a fight against alarming air pollution levels that have hit nine times World Health Organisation (WHO) limits. Air pollution has been a chronic problem in rapidly growing Kathmandu, which sits in a Himalayan valley and is home to more than 3mn people. (Photo by Navesh Chitrakar/Reuters)

Spectators shoot video with his their cellphones as Aerosparx Grob109b motor gliders launch fireworks while performing aerobatics at the end of Oeiras Valley Air Show, an aerobatics festival integrated in the Portugal Air Summit'22, over Santo Amaro Beach on October 16, 2022 in Oeiras, Portugal. The festival included various aerobatics performances with airplanes from the Air Race Championship, a Supermarine Spitfire, and air shows by former world champions Ramón Alonso, Castor Fantoba, Jorge Macias, Luís Garção, Quijote, Jacobstars and The Raven Team. It also had an overflight of the Portuguese Air Force F16s and, at the end of the afternoon, Aerosparx team illuminating Santo Amaro water mirror with fireworks launched from the airplanes' wings. (Photo by Horacio Villalobos#Corbis/Corbis via Getty Images)

Members of the police forces of the Republic of Srpska march during a parade marking the 32nd anniversary of the Republic of Srpska, in the Bosnian town of Banja Luka, 240 kms northwest of Sarajevo, Tuesday, January 9, 2024. The United States on Tuesday warned that ongoing celebrations of a Bosnian Serb self-proclaimed national holiday were in violation of Bosnia's constitution and a 1995 peace agreement, and as such amounted to a criminal offense. The Jan. 9 holiday commemorates the date in 1992 when Bosnian Serbs declared the creation of their own state in Bosnia, igniting the country's devastating four-year war that killed more than 100,000 people. (Photo by Radivoje Pavicic/AP Photo)

Palestinians fleeing Khan Yunis arrive in Rafah with their belongings in a damaged car on February 15, 2024, as battles raged in the sourthern Gaza Strip between Israel and the Palestinian militant group Hamas. (Photo by Mohammed Abed/AFP Photo)

Policemen guard Poland's Supreme Court as a protester lies on the pavement in Warsaw, Poland, on Thursday, April 22, 2021. A disputed disciplinary body within Poland's Supreme Court is examining a motion that could result in the arrest of a judge who has become a symbol of the fight for an independent judiciary. (Photo by Czarek Sokolowski/AP Photo)

“By 1969, the fashion choices of tens of millions of young American men and women were as variegated and ever-evolving as the world around them. Cultural transformation was an irresistible force during the Sixties, and across America and around the globe civil rights, women’s and gay liberation, the sexual revolution and, of course, the explosive soundtrack of R&B, soul and rock and roll informed everything from politics to fashion”. – LIFE. Photo: Corona del Mar High School students Kim Robertson, Pat Auvenshine and Pam Pepin wear “hippie” fashions, 1969. (Photo by Arthur Schatz/Time & Life Pictures)

An injured fan is helped by a riot policeman during clashes between Red Star Belgrade and Partizan Belgrade fans in the stadium before the teams' Serbian Superliga soccer match in Belgrade, April 25, 2015. Serbian league leaders Partizan Belgrade held champions and bitter city foes Red Star to a 0-0 draw in a derby match marred by bad crowd trouble before kickoff on Saturday. The start was delayed for 45 minutes after home Red Star supporters pelted riot police with seats and flares, forcing officers to retreat from the north tier that houses the club's diehard fans. (Photo by Marko Djurica/Reuters)

In this Monday, July 20, 2015 photo, Bill Lattin, the Southern California Timing Association president and Speed Week race director, stands in the Bonneville Salt Flats in Utah. A small city of tents, trailers and thousands of visitors appears almost every August in the Utah desert to watch cars, motorcycles and anything with wheels rocket across gleaming white sheets of salt at speeds of 400 mph. But wet weather has forced the cancellation of Speed Week for the second straight year and revived a debate about whether nearby mining is depleting the Bonneville Salt Flats of their precious resource. (Photo by Rick Bowmer/AP Photo)