A line of soldiers firing handguns during a training session, circa 1920. (Photo by Keystone). P.S. All pictures are presented in high resolution.

Members of Pakistan's Christian minority attend a service ahead of Christmas in Lahore, Pakistan, 22 December 2021. Pakistan is a majority Sunni Muslim country and home to four million Christians out of a total population of around 200 million people. (Photo by Rahat Dar/EPA/EFE)

Thomas Shelby makes a fire as he prepares to stay the night by the rubble of his home to protect from potential looters in Dawson Springs, Kentucky, on Saturday, December 11, 2021. One or more tornados tore through Dawson Springs late last night. (Photo by Austin Anthony/The Washington Post)

Afghans pass a clothing storein Kabul, Afghanistan, Tuesday, October 12, 2021. (Photo by Ahmad Halabisaz/AP Photo)

Women wearing traditional attire take a selfie as they practice the Garba, the traditional dance of Gujarat state, ahead of Navratri in Ahmedabad, India, Tuesday, September 20, 2022. The Hindu festival of Navratri, or nine nights, will begin Sept. 26. (Photo by Ajit Solanki/AP Photo)

Vendors wait for customers at a wholesale vegetable market in Dhaka on September 4, 2022. (Photo by Munir Uz Zaman/AFP Photo)

A baby baboon appears to ride its mother like a horse at the Chobe River, in The Chobe National Park, Botswana, Southern Africa in January 2023. Young monkeys often ride on their parent's backs, like this Chacma baboon, for protection. (Photo by William Steel/Solent News & Photo Agency)

Aerial view of a boat working in the green water of Taihu Lake covered by blue-green algae, Wuxi city, Jiangsu province, China on May 23, 2018. (Photo by Imaginechina/Rex Features/Shutterstock)