The official story released at the time was that Slotin, by quickly removing the upper hemisphere, was a hero for ending the critical reaction and protecting seven other observers in the room: "Dr. Slotin's quick reaction at the immediate risk of his own life prevented a more serious development of the experiment which would certainly have resulted in the death of the seven men working with him, as well as serious injury to others in the general vicinity." This interpretation of events was endorsed at the time by Alvin Graves, who stood closest to Slotin when the accident occurred. Graves, like Slotin, had previously displayed a low concern for nuclear safety, and later alleged that fallout risks were "concocted in the minds of weak malingerers." Another witness to the accident, Raemer E. Schreiber, spoke out publicly decades later, arguing that Slotin was using improper and unsafe procedures, endangering the others in the lab along with himself. Robert B. Brode had reported hearsay to that effect back in 1946.