A staff member numbers test samples for the remains of fallen soldiers at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

A staff member inspects a cut bone sample at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

A staff member works at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

A staff member checks boxes in the sample storage room for the remains of fallen soldiers at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

A staff member works at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

Staff members check boxes in the sample storage room for the remains of fallen soldiers at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

Staff members work at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)

A staff member cuts a bone fragment from the remains of a fallen soldier at the Center for DNA Identification (CDI), which is part of the Vietnam Academy of Science and Technology, in Hanoi on October 8, 2026. The center attempts to identify soldiers killed in Vietnam through DNA analysis of genetic material extracted from bones recovered from battlefields, and matching it with samples provided by relatives. Vietnamese authorities have said there is an intensified effort to locate the remains of soldiers who perished in Vietnam's wars. (Photo by Nhac NGUYEN / AFP via Getty Images)