Iraqi forces gather during an operation to attack Islamic State militants in Mosul, Iraq, October 21, 2016. (Photo by Reuters/Stringer)

A man arranges a display of cacti during preparations for the RHS Chelsea Flower Show in London, Britain May 21, 2016. (Photo by Neil Hall/Reuters)

A Saudi soldier fires a mortar towards Houthi movement position, at the Saudi border with Yemen April 21, 2015. (Photo by Reuters/Stringer)

Women wear traditional Hanbok dresses as they walk past fallen autumn leaves in Seoul on November 21, 2022. (Photo by Anthony Wallace/AFP Photo)

An ambulance with emergency lights on makes its way through snowfall in Iowa, US on December 21, 2022. (Photo by Joseph Cress/AP Photo)

Huge pack of starlings in the sky of the Negev, Israel, on January 21, 2013. Birds are turned in evening twilight before settling to sleep. (Photo by Eliyahu Hershkovitz)

Starlings gather on power lines at dusk, Friday, October 21, 2022, in Overland Park, Kan. (Photo by Charlie Riedel/AP Photo)

A girl competes in a hobby horsing competition in St. Petersburg, Russia, April 21, 2024. (Photo by Dmitri Lovetsky/AP Photo)