moved elsewhere. Starting on Christmas Day in 1950, the United States made a sweeping change in its policies regarding the handling of soldiers who had been killed in action. Rather than burying them in temporary cemeteries for return at a future date after the conclusion of the war, soldiers killed in action were immediately returned to the United States. This policy, known as concurrent return, remains in effect to this day. Vietnam War Better transportation, communication, and laboratory techniques allowed a higher rate of body identification in the Vietnam War than in previous conflicts. 96% of Americans killed in action were recovered, compared to 78% for both World War II and Korea. By the end of the war, only 28 bodies remained unidentified. All but one of them were identified by 1984, when the last one was interred in the Tomb of the Unknowns. (Using mitochondrial DNA, in 1998 the last unknown was identified as Michael Blassie.) Iraq War and War in Afghanistan The 54th Quartermaster Company and 111th Quartermaster Company are the Army's only standing, permanent mortuary affairs units. Mortuary affairs training takes place at Fort Lee, Virginia, and lasts about seven weeks. These soldiers search areas for hasty or unmarked graves, unburied dead, personal effects, and identification media. They also assist in preparation, preservation, and shipment of remains. The Charles C. Carson Center for Mortuary Affairs at Dover Air Force Base is where remains of those killed in action are processed and returned home. There are currently two U.S. Army Mortuaries located in Germany and Korea. These locations have U.S. licensed funeral directors and embalmers along with 92M staffing to provide services to all Department of Defense components that are located within their respective areas. Some of those who have volunteered to work with the dead will serve at collection points in Iraq and Afghanistan; others will work in the port mortuary at Dover Air Force Base in Delaware. Another small group will work with the 246th or 311th Quartermaster Company from Puerto Rico, a Reserve Mortuary Affairs unit, in Dover Air Force Base in Delaware, at the Joint Personal Effects Depot (JPED). Here, soldiers will receive, inventory, process, clean, filter, and ship all items belonging to deceased or injured soldiers. The 92Ms have cared for the majority of the more than 4,500 military casualties in Iraq and Afghanistan. They operate under a code of conduct that's part