Really enjoyed Ulman's debut El Planeta, but this didn't grab me in the same way. Still fun though.

The core of the film violently rattles:
It could happen again.
That's the clearest takeaway from Resnais' classic Holocaust documentary. It is too easy to forget what once occured on these barren fields, yards and tracks. Such things could be happening now, and the unlooking mind would have no clue.
Look at the horrors with open eyes.
And when it's over, keep your eyes open.