Iraqi engineer Hazem Mohammed, who was hit by two bullets but survived the mass killing in which his brother perished, walks on the site of an unearthed mass grave from which people where exhumed that are believed to have been executed under Saddam Hussein's regime after an uprising in 1991, on the outskirts of the city of Najaf, Iraq January 24, 2023. REUTERS/Alaa Al-Marjani 

A view of sandals found on the site of an unearthed mass grave from which people where exhumed that are believed to have been executed under Saddam Hussein's regime after an uprising in 1991, on the outskirts of the city of Najaf, Iraq January 24, 2023. REUTERS/Alaa Al-Marjani 

An aerial view shows Iraqi engineer Hazem Mohammed, who was hit by two bullets but survived the mass killing in which his brother perished, walks on the site of an unearthed mass grave from which people where exhumed that are believed to have been executed under Saddam Hussein's regime after an uprising in 1991, on the outskirts of the city of Najaf, Iraq January 24, 2023. REUTERS/Alaa Al-Marjani 

Oleksii Lukov 37 examines a fallen Ukrainian soldier’s helmet as his team searches, exhumes and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Artur Simeiko 26, exhumes the body of a fallen Ukrainian soldier with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

The team from the humanitarian mission "Black Tulip" to exhume the bodies of fallen Ukrainian soldiers with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Artur Simeiko 26, exhumes the body of a fallen Ukrainian soldier with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Humanitarian mission "Black Tulip" searches, exhumes, and retrieves bodies of fallen soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Andrii Smeiko 21, walks as Artur Simeiko 26, tapes off an area before exhuming the body of a fallen Ukrainian soldier with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Artur Simeiko 26, tapes off an area before exhuming the body of a fallen Ukrainian soldier with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Andrii Smeiko 21, and Artur Simeiko 26, exhume the body of a fallen Ukrainian soldier as Oleksii Lukov 37 and Denys Sosnenko 21, look on, while working with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

The tools of humanitarian mission ‘Black Tulip’ are seen during a search to exhume and retrieve bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. ‘Black Tulip’ exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trade the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

The team from the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Denys Sosnenko 21, flies a drone to document the exhumation of bodies of fallen Ukrainian soldiers with the humanitarian mission "Black Tulip" which searches, exhumes, and retrieves bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. "Black Tulip" exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Artur Simeiko 26, cleans a credit card from the body of a fallen Ukrainian soldier found with the humanitarian mission ‘Black Tulip’ to search, exhume and retrieve bodies of soldiers, as Russia's attack on Ukraine continues, in Yampil, Ukraine, January 2, 2023. ‘Black Tulip’ exhumes bodies of both Ukrainian and Russian soldiers on the battlefield and trades the bodies of deceased Russian soldiers they find for the bodies of deceased Ukrainian soldiers to return to their families. REUTERS/Clodagh Kilcoyne 

Tamila Pehyda, 67, attends an exhumation of her husband Serhii, 70, who was killed by shrapnel during a Russian missiles attack on June 21 in the village of Vysokopillia, Kherson region, Ukraine December 5, 2022. REUTERS/Anna Voitenko 

Tamila Pehyda, 67, stands near a plastic bag with an exhumed body of her husband Serhii, 70, who was killed by shrapnel during a Russian missiles attack on June 21 in the village of Vysokopillia, Kherson region, Ukraine December 5, 2022. REUTERS/Anna Voitenko TPX IMAGES OF THE DAY 

Tamila Pehyda, 67, attends an exhumation of her husband Serhii, 70, who was killed by shrapnel during a Russian missiles attack on June 21 in the village of Vysokopillia, Kherson region, Ukraine December 5, 2022. REUTERS/Anna Voitenko TPX IMAGES OF THE DAY 

Nina Melenets, 62, shows a photo on her phone of her missing husband Serhiy Melenets, 65, in Izium, Kharkiv region, Ukraine, November 2, 2022. Melenets is still looking for Serhiy, who has been missing since late March. Her surviving son has given DNA samples to forensic experts to see if there is a match among the bodies exhumed from a mass grave nearby in the city of Izium. "It will be easier for our hearts if they match the DNA," she said. "We spent 44 years together. We spent our whole lives together." REUTERS/Clodagh Kilcoyne SEARCH "KHARKIV MISSING" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A cross lies over the grave of a person exhumed from an improvised cemetery in Izium, Kharkiv region, Ukraine, October 19, 2022. The Hague-based International Commission on Missing Persons, an intergovernmental organization, estimates that more than 15,000 people have gone missing across Ukraine during the war, including detainees, those separated from their loved ones and people killed and buried in makeshift graves. REUTERS/Clodagh Kilcoyne SEARCH "KHARKIV MISSING" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

A cross lies in the empty grave of a person exhumed from an improvised cemetery in Izium, Kharkiv region, Ukraine, October 19, 2022. The Hague-based International Commission on Missing Persons, an intergovernmental organization, estimates that more than 15,000 people have gone missing across Ukraine during the war, including detainees, those separated from their loved ones and people killed and buried in makeshift graves. REUTERS/Clodagh Kilcoyne SEARCH "KHARKIV MISSING" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A forensics photographer takes a picture of a body they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics prepare a plastic bag for a body they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

A forensics films a body they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics lie down a body of an army officer they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics carry a body of an army officer they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemrä 

Forensics carry a body of an army officer they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

A forensics photographer takes a picture of a body they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics lie down a body of an army officer they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics carry a body of an army officer they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Army officers walk past bodies exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics carry a body they exhumed from, what Ukrainians said, a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics carry a body of an army officer they exhumed from what Ukrainian officials say is a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics carry a body of an army officer they exhumed from what Ukrainian officials say is a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

A view of bodies that were exhumed from what Ukrainian officials say is a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Forensics carry a body of an army officer they exhumed from what Ukrainian officials say is a mass grave, amid Russia's invasion of Ukraine, in the newly recaptured town of Lyman, Donetsk region, Ukraine, October 11, 2022. REUTERS/Zohra Bensemra 

Francisca Bosca , daughter of Vicente Bosca, who was killed by the forces of dictator Francisco Franco, poses with a photo of her father after receiving his remains, which were exhumed by the Scientific Association ArqueoAntro, in the Paterna cemetery, Spain, October 1, 2022. Government estimates point to 114,000 civilians who disappeared, presumably killed, behind Franco forces' lines during the war and throughout the dictatorship. REUTERS/Juan Medina 

Francisca Bosca , daughter of Vicente Bosca, who was killed by the forces of dictator Francisco Franco, receives her father's remains after they were exhumed by the Scientific Association ArqueoAntro in the Paterna cemetery, Spain, October 1, 2022. Government estimates point to 114,000 civilians who disappeared, presumably killed, behind Franco forces' lines during the war and throughout the dictatorship. REUTERS/Juan Medina 

Conchita Molla, daughter of Vicente Molla, who was killed by the forces of dictator Francisco Franco, receives her father's remains after they were exhumed by the Scientific Association ArqueoAntro in the Paterna cemetery, Spain, October 1, 2022. Government estimates point to 114,000 civilians who disappeared, presumably killed, behind Franco forces' lines during the war and throughout the dictatorship. REUTERS/Juan Medina 

Relatives of Bautista Penades and Hermenegildo Penades, who were killed by the forces of dictator Francisco Franco, attend a ceremony holding boxes with their remains after they were exhumed by the Scientific Association ArqueoAntro in the Paterna cemetery, Spain, October 1, 2022. Government estimates point to 114,000 civilians who disappeared, presumably killed, behind Franco forces' lines during the war and throughout the dictatorship. REUTERS/Juan Medina 

Ukrainian servicemen exhume the body of Ukraine's National Guard member, who was killed during Russia's attack on Ukraine, in the village of Dementiivka, Kharkiv region, Ukraine September 26, 2022. REUTERS/Vyacheslav Madiyevskyy 

Exhumed bodies lie at a place of a mass burial, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 23, 2022. REUTERS/Viacheslav Ratynskyi 

Bags with exhumed bodies of people are seen inside a truck at a site of a mass burial, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 23, 2022. The inscription on the bags reads: "Unknown person". REUTERS/Viacheslav Ratynskyi 

Members of the Ukrainian Emergency Service carry the exhumed body of a person to a truck at a site of a mass burial, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 23, 2022. REUTERS/Viacheslav Ratynskyi 

Members of the Ukrainian Emergency Service place the exhumed body of a person in a truck at a site of a mass burial, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 23, 2022. REUTERS/Viacheslav Ratynskyi 

A member of Ukrainian Emergency Service walks next to bodies at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 19, 2022. REUTERS/Vyacheslav Madiyevskyy 

Members of Ukrainian Emergency Service carry a body as they work at a place of mass burials during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 19, 2022. REUTERS/Sofiia Gatilova 

Members of Ukrainian Emergency Service work at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 19, 2022. REUTERS/Gleb Garanich 

Members of Ukrainian Emergency Service work at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 19, 2022. REUTERS/Gleb Garanich 

Members of Ukrainian Emergency Service work at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 19, 2022. REUTERS/Gleb Garanich 

A cross is seen at a forest grave site during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 18, 2022. REUTERS/Umit Bektas TPX IMAGES OF THE DAY 

An empty coffin is seen at a forest grave site during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 18, 2022. REUTERS/Umit Bektas 

Experts work at a forest grave site during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 18, 2022. REUTERS/Umit Bektas 

Experts work at a forest grave site during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 18, 2022. REUTERS/Umit Bektas 

A war crimes prosecutor stands as experts work at a forest grave site during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 18, 2022. REUTERS/Umit Bektas 

A local resident Volodymyr Kolesnyk steppes between graves as he looks for relatives at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 17, 2022. REUTERS/Gleb Garanich 

A local resident Volodymyr Kolesnyk steppes between graves as he looks for relatives at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 17, 2022. REUTERS/Gleb Garanich 

A local resident Volodymyr Kolesnyk steppes between graves as he looks for relatives at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 17, 2022. REUTERS/Gleb Garanich 

Members of Ukrainian Emergency Service carry a body as they work at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 17, 2022. REUTERS/Gleb Garanich 

Members of Ukrainian Emergency Service carry a body as they work at a place of mass burial during an exhumation, as Russia's attack on Ukraine continues, in the town of Izium, recently liberated by Ukrainian Armed Forces, in Kharkiv region, Ukraine September 17, 2022. REUTERS/Gleb Garanich