the british forced the former ss camp personnel to help bury the thousands of dead bodies in mass graves. some civil servants from celle and "landkreis celle" were brought to belsen and confronted with the crimes committed on their doorstep. military photographers and cameramen of no. 5 army film and photographic unit documented the conditions in the camp and the measures of the british army to ameliorate them. many of the pictures they took and the films they made from april 15 to june 9, 1945 were published or shown abroad. today, the originals are in the imperial war museum. these documents had a lasting impact on the international perception and memory of nazi concentration camps to this day. according to habbo knoch, head of the institution that runs the memorial today: "bergen-belsen [...] became a synonym world-wide for german crimes committed during the time of nazi rule."