While attempting to unclog a uranium enrichment device at the Philadelphia Navy Yard, Pennsylvania, United States for the Manhattan Project, chemists Peter Bragg, Douglas Meigs, and Arnold Kramish accidentally set of an explosion, which sprayed liquid uranium hexafluoride and hydrofuoric acid on them. Bragg and Meigs were killed, while Kramish and two soldliers, George LeFevre and John Tompkins, were seriously injured Facility
