What is the most significant and watched footage of actual/unstaged events ever recorded? Among the obvious candidates: Abraham Zapruder’s film of John F. Kennedy’s assassination on November 23, 1963; NASA’s footage of Neil Armstrong’s first steps on the moon on July 21, 1969; and the live TV news footage of the second plane crashing into the World Trade Center on September 11, 2001. Long before those events took place, though, another one of at least as much historical importance as any of them — and, in my humble opinion, of even greater importance — was also visually recorded, seen by the vast majority of Americans alive at the time, and, yes, questioned by conspiracy theorists: the liberation of the Nazi concentration camps. The biggest difference between this footage and the rest? The story behind it has been largely forgotten. I think it’s worth retelling.