June 6 marks the 75th anniversary of D-Day, when more than 150,000 Allied troops spilled onto five beach along the French coast in what is seen as the primary turning point, the beginning of the end of World War II.
That day, some 9,000 Allied troops were either killed or injured during the historic invasion.
The survivors of that day are dwindling, felled by old age or death.
The commemoration this year is likely the last big occasion involving those who took part in the largest amphibious assault in history.
Today on All Sides, how historians and others work to keep the history alive.