Operation Fitzwilliam
Operation Fitzwilliam was a highly classified US Air Force operation with the objective of developing methods for Long Range Detection (LRD) of nuclear detonations. Conducted in conjunction with Operation Sandstone, the 1948 atomic tests at Eniwetok Atoll, it integrated airborne radioactive debris collection, seismic monitoring, and atmospheric acoustic wave detection to ensure that the U.S. could detect, track, and analyze nuclear detonations worldwide.