The default is the unclear audio, corrupted after years of unsafe storage since 2008. The clearer version can be heard, click see inside and switch the broadcast block from Unclear, to Clear. This will clean up the audio, better for searching about what happened on that dark day. Both scientists survived, the guard who led them out and recorded everything sadly didn't survive. Best heard with equipment like headphones or earphones. File of Recording-1: https://scratch.mit.edu/projects/848412097
