Two holidaymakers amuse themselves with a porter's trolley whilst waiting for their train at Euston Station, London, 5th August 1939. (Photo by A. J. O'Brien/Fox Photos/Getty Images)

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine on April 10, 2021. (Photo by Oleksandr Klymenko/Reuters)

A hot air balloon floats over farm fields south of Washington, Ill., as the sun slips behind clouds on the autumn afternoon of Wednesday, September 24, 2014. (Photo by Ron Johnson/AP Photo/Peoria Journal Star)

Ngorongoro Crater (Tanzania). At 610m deep and 260 sq km, this is the largest unflooded caldera in the world. A blue-green vision from above it's a haven for engangered wildlife and Maasai livestock. The crater was formed three million years ago when a giant volcano, which could have been as high as Kilimanjaro, exploded and collapsed. The caldera formed the concentric fractures in the crust cracked down to a magma reservoir deep underground. (Photo by John Bryant/Getty Images)

Canada's Deanna Stellato-Dudek and Maxime Deschamps perform in the gala exhibition during the ISU Grand Prix of Figure Skating Final in Beijing on December 10, 2023. (Photo by Wang Zhao/AFP Photo)

A bomb-laden Su-25 jet at the Hmeimim air base in December 2015. Russia's lease agreement obliged Assad’s military to safeguard the perimeter of the Hmeimim base, while giving Moscow legal jurisdiction over the facilities inside. Negotiating perimeter protection from Syria’s new rulers will be vital for the Russian bases in an era of wire-controlled drones immune to jamming. (Photo by AP Photo)

A Somali family wades through flood waters, as they flee after overnight rains destroyed their home, in Wadajir district of Mogadishu, Somalia on May 10, 2025. (Photo by Feisal Omar/Reuters)

FC Barcelona's fans celebrate winning the Spanish LaLiga soccer championship at Canaletas Square in Barcelona, Spain, 15 May 2025, after the Spanish LaLiga soccer match between RCD Espanyol and FC Barcelona at the RCDE Stadium in Cornella de Llobregat. (Photo by Quique Garcia/EPA/EFE)