A group of South Korean and U.S. academics is working to revisit the Korean War six decades later in a tech-savvy way: by digitizing photos, maps, official documents and video footage of interviews with war veterans. The move comes as the two Koreas this week mark the 61st anniversary of the start of the 1950-53 war, in which a total of 21 nations dispatched troops to help the South fight against the invading North, supported by its communist ally, China.