The Vietnam Slide Project was created by photo editor Kendra Rennick, who began collecting photo slides after a close friend lost her father, a Vietnam veteran. Her friend found a box of slides that her father had taken while in Vietnam and from there Rennick has continued to collect photographs that Vietnam veterans took during their tours of duty. Here: A photo taken from the collection of D.Thornton, who served in the First Air Cavalry division of the United States Army. (Photo by D.Thornton/The Vietnam Slide Project)

Church members pray at the Dolieb Hill Presbyterian Church in the Protection of Civilians (POC) site at the United Nations Mission in South Sudan (UNMISS) compound in Malakal, South Sudan on Saturday, July 9, 2016. (Photo by Jane Hahn/The Washington Post)

England fan stripped down to her underwear and jumped in the canal in Birmingham, United Kingdom after team lose the 2018 World Cup semi- final against Croatia in Moscow on July 11, 2018. (Photo by Caters News Agency)

Russian servicemen look on as a Mi-24 helicopter fly overhead during the Open Water competition for pontoon bridge units, as part of the International Army Games 2018, outside Murom, Russia August 3, 2018. (Photo by Maxim Shemetov/Reuters)

A handout photo made available by Limex Images of Pete McLeod of Canada (R) and Kirby Chambliss of the United States flying over the city of Kazan prior to the fifth stage of the Red Bull Air Race World Championship in Russia on August 22, 2018. (Photo by Joerg Mitter/EPA/EFE/Limex Images)

A performer wearing a face shield looks on during a ceremony held by the Bangkok National Museum to celebrate the return of two ancient relics, believed to have been stolen from Thailand about 60 years ago, from the United States, in Bangkok, Thailand on May 31, 2021. (Photo by Soe Zeya Tun/Reuters)

Kaden Bringsplenty brings his horse to the starting line as Native Americans from all over the United States participate in an Indian relay race over Memorial Day weekend at the Osage County Fairgrounds in Pawhuska, Oklahoma, U.S. May 30, 2021. (Photo by Stephanie Keith/Reuters)

Olympic medal winning twins Jessica (left) and Jennifer Gadirova celebrate their GCSE results at Aylesbury Vale Academy in Buckinghamshire, United Kingdom onThursday, August 12, 2021. (Photo by Steve Parsons/PA Images via Getty Images)