Dr. Janet Finlayson, Defense POW/MIA Accounting Agency (DPAA) Scientific Recovery Expert (SRE), scrapes a layer of soil off the inside of a unit during a recovery mission in the Lao People’s Democratic Republic, Nov. 10, 2023. After determining the site perimeter, Finlayson established a grid system, sectioning the site with stakes and string before beginning excavation unit by unit. There are currently 1,578 missing service members from the Vietnam War. (U.S. Air Force photo by Staff Sgt. Blake Gonzales)