[It] fuses present-tense scenes and archival images, evoking the Holocaust, and the politics that led to it, in terms of the struggle to recover stifled memories and presenting the clarity of memory as essential to political progress.

Only half an hour long, this is the greatest film ever made about the concentration camps.

The documentary by no means covers the entire history of the camps or the Holocaust, and there's plenty that's left out in its 32-minute runtime, but there's no doubting it's an important film that still serves as a strong reminder today.

It's gutting and I am glad I watched it but would be grateful never to revisit it.