Around 850 people devote their daily lives to preserving the memory of more than one million people who died at the Auschwitz-Birkenau Nazi death camp, which was liberated 80 years ago this month. Working at the site of the former camp every day as guides, curators, historians and press officers, it’s a job with more emotional baggage than the usual nine-to-five. "If you start working here, you either leave very quickly (...) or you stay for a long time," says Pawel Sawicki, who has been multimedia manager at the Auschwitz-Birkenau museum for 17 years. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES N°36UB8VU