Kaysing also claimed that NASA staged both the Apollo 1 fire and the Space Shuttle "Challenger" accident, deliberately murdering the astronauts on board, suggesting that NASA might have learned that these astronauts were about to expose the conspiracy and needed to guarantee their silence. He also believed that the disappearance of Thomas Baron's 500-page report on the Apollo 1 fire and Baron's death in a rail-traffic accident a week after he testified before the United States Congress were not accidents.