Over 30 Douglas C-47 Skytrains (Dakotas) making final preparations for flight formation practice before the 75th D-Day Anniversary flight to Normandy in Duxford, England on June 4, 2019. (Photo by UK Air Force Images)

Pilgrims rest on June 6, 2019 in Villamanrique, during a pilgrimage to the village of El Rocio. El Rocio pilgrimage, the largest in Spain, gathers hundreds of thousands of devotees in traditional outfits converging in a burst of colour as they make their way on horseback and on board decorated carriages across the Andalusian countryside. (Photo by Cristina Quicler/AFP Photo)

It’s enough to make your head spin. The photographer Katherine Young set out to shoot spiral staircases in London, England to great effect, including this shot she calls the Downward Spiral Part III. (Photo by Katherine Young/Rex Features/Shutterstock)

New Orleans police officers try to keep their heads down as they move in on a Black Panther headquarters during an exchange of gunfire in New Orleans on September 15, 1970. The shootout occurred as police moved in to make arrests on Tuesday morning following a series of incidents. (Photo by Jack Thornell/AP Photo)

Indonesian students go to school via a makeshift suspension bridge in Ngemplak, Boyolali regency, Indonesia on November 15, 2017. The lack of access to roads makes students every day to cross the dangerous waterways to go to school. (Photo by Arief Setiadi/Pacific Press/Barcroft Images)

Manman Luk, a freelance model and make up artist, poses inside her 100-square-foot (9-square-metre) sub-divided unit, paying a monthly rent of HK4,700 ($606) in Hong Kong, China January 6, 2017. (Photo by Bobby Yip/Reuters)

A competitor makes their way through fire as they take part in the Tough Guy endurance event near Wolverhampton, central England, on January 27, 2019. The Tough Guy event challenges hundreds of competitors to run a gruelling course whilst negotiating up to 300 obstacles including water, fire, and tunnels. (Photo by Oli Scarff/AFP Photo)

Yuccas catch fire as the Powerhouse fire makes a fast run toward Lake Hughes, south of Lake Hughes, California, on June 1, 2013. The 19,500-acre wildfire destroyed numerous homes overnight. (Photo by David McNew/Getty Images)